Added a Config option for the pretty lines; now cleaning up pretty lines if there's an exception, slowed down updates a bit.
Added a Config option for the pretty lines; now cleaning up pretty lines if there's an exception, slowed down updates a bit.

file:b/.gitattributes (new)
--- /dev/null
+++ b/.gitattributes
@@ -1,1 +1,13 @@
+* text=auto
+* eol=lf
 
+# These files are text and should be normalized (convert crlf => lf)
+*.cs      text diff=csharp
+*.cfg     text
+*.csproj  text
+*.sln     text
+
+# Images should be treated as binary
+# (binary is a macro for -text -diff)
+*.png     binary
+

--- a/ARConfiguration.cs
+++ b/ARConfiguration.cs
@@ -7,18 +7,47 @@
 using System;
 using ToadicusTools;
 using UnityEngine;
-
-[assembly: KSPAssemblyDependency("ToadicusTools", 0, 0)]
 
 namespace AntennaRange
 {
 	[KSPAddon(KSPAddon.Startup.SpaceCentre, false)]
 	public class ARConfiguration : MonoBehaviour
 	{
+		public static bool RequireLineOfSight
+		{
+			get;
+			private set;
+		}
+
+		public static double RadiusRatio
+		{
+			get;
+			private set;
+		}
+
+		public static bool RequireConnectionForControl
+		{
+			get;
+			private set;
+		}
+
+		public static bool FixedPowerCost
+		{
+			get;
+			private set;
+		}
+
+		public static bool PrettyLines
+		{
+			get;
+			private set;
+		}
+
 		private bool showConfigWindow;
 		private Rect configWindowPos;
 
 		private IButton toolbarButton;
+		private ApplicationLauncherButton appLauncherButton;
 
 		private System.Version runningVersion;
 
@@ -40,37 +69,66 @@
 		{
 			Tools.PostDebugMessage(this, "Waking up.");
 
+			this.runningVersion = this.GetType().Assembly.GetName().Version;
+
 			this.showConfigWindow = false;
 			this.configWindowPos = new Rect(Screen.width / 4, Screen.height / 2, 180, 15);
 
+
+			this.configWindowPos = this.LoadConfigValue("configWindowPos", this.configWindowPos);
+
+			ARConfiguration.RequireLineOfSight = this.LoadConfigValue("requireLineOfSight", false);
+
+			ARConfiguration.RadiusRatio = (1 - this.LoadConfigValue("graceRatio", .05d));
+			ARConfiguration.RadiusRatio *= ARConfiguration.RadiusRatio;
+
+			ARConfiguration.RequireConnectionForControl =
+				this.LoadConfigValue("requireConnectionForControl", false);
+
+			ARConfiguration.FixedPowerCost = this.LoadConfigValue("fixedPowerCost", false);
+
+			ARConfiguration.PrettyLines = this.LoadConfigValue("drawPrettyLines", true);
+
+			GameEvents.onGameSceneLoadRequested.Add(this.onSceneChangeRequested);
+
+			Debug.Log(string.Format("{0} v{1} - ARConfiguration loaded!", this.GetType().Name, this.runningVersion));
+
 			Tools.PostDebugMessage(this, "Awake.");
 		}
 
 		public void OnGUI()
 		{
 			// Only runs once, if the Toolbar is available.
-			if (this.toolbarButton == null && ToolbarManager.ToolbarAvailable)
-			{
-				this.runningVersion = this.GetType().Assembly.GetName().Version;
-
-				Tools.PostDebugMessage(this, "Toolbar available; initializing button.");
-
-				this.toolbarButton = ToolbarManager.Instance.add("AntennaRange", "ARConfiguration");
-				this.toolbarButton.Visibility = new GameScenesVisibility(GameScenes.SPACECENTER);
-				this.toolbarButton.Text = "AR";
-				this.toolbarButton.TexturePath = "AntennaRange/Textures/toolbarIcon";
-				this.toolbarButton.TextColor = (Color)XKCDColors.Amethyst;
-				this.toolbarButton.OnClick += delegate(ClickEvent e)
-				{
-					this.showConfigWindow = !this.showConfigWindow;
-				};
-
-				this.configWindowPos = this.LoadConfigValue("configWindowPos", this.configWindowPos);
-				AntennaRelay.requireLineOfSight = this.LoadConfigValue("requireLineOfSight", false);
-				ARFlightController.requireConnectionForControl =
-					this.LoadConfigValue("requireConnectionForControl", false);
-
-				Debug.Log(string.Format("{0} v{1} - ARonfiguration loaded!", this.GetType().Name, this.runningVersion));
+			if (ToolbarManager.ToolbarAvailable)
+			{
+				if (this.toolbarButton == null)
+				{
+					Tools.PostDebugMessage(this, "Toolbar available; initializing toolbar button.");
+
+					this.toolbarButton = ToolbarManager.Instance.add("AntennaRange", "ARConfiguration");
+					this.toolbarButton.Visibility = new GameScenesVisibility(GameScenes.SPACECENTER);
+					this.toolbarButton.Text = "AR";
+					this.toolbarButton.TexturePath = "AntennaRange/Textures/toolbarIcon";
+					this.toolbarButton.TextColor = (Color)XKCDColors.Amethyst;
+					this.toolbarButton.OnClick += delegate(ClickEvent e)
+					{
+						this.toggleConfigWindow();
+					};
+				}
+			}
+			else if (this.appLauncherButton == null && ApplicationLauncher.Ready)
+			{
+				Tools.PostDebugMessage(this, "Toolbar available; initializing AppLauncher button.");
+
+				this.appLauncherButton = ApplicationLauncher.Instance.AddModApplication(
+					this.toggleConfigWindow,
+					this.toggleConfigWindow,
+					ApplicationLauncher.AppScenes.SPACECENTER,
+					GameDatabase.Instance.GetTexture(
+						"AntennaRange/Textures/appLauncherIcon",
+						false
+					)
+				);
 			}
 
 			if (this.showConfigWindow)
@@ -99,10 +157,10 @@
 
 			GUILayout.BeginHorizontal(GUILayout.ExpandWidth(true));
 
-			bool requireLineOfSight = GUILayout.Toggle(AntennaRelay.requireLineOfSight, "Require Line of Sight");
-			if (requireLineOfSight != AntennaRelay.requireLineOfSight)
-			{
-				AntennaRelay.requireLineOfSight = requireLineOfSight;
+			bool requireLineOfSight = GUITools.Toggle(ARConfiguration.RequireLineOfSight, "Require Line of Sight");
+			if (requireLineOfSight != ARConfiguration.RequireLineOfSight)
+			{
+				ARConfiguration.RequireLineOfSight = requireLineOfSight;
 				this.SaveConfigValue("requireLineOfSight", requireLineOfSight);
 			}
 
@@ -111,29 +169,97 @@
 			GUILayout.BeginHorizontal(GUILayout.ExpandWidth(true));
 
 			bool requireConnectionForControl =
-				GUILayout.Toggle(
-					ARFlightController.requireConnectionForControl,
+				GUITools.Toggle(
+					ARConfiguration.RequireConnectionForControl,
 					"Require Connection for Probe Control"
 				);
-			if (requireConnectionForControl != ARFlightController.requireConnectionForControl)
-			{
-				ARFlightController.requireConnectionForControl = requireConnectionForControl;
+			if (requireConnectionForControl != ARConfiguration.RequireConnectionForControl)
+			{
+				ARConfiguration.RequireConnectionForControl = requireConnectionForControl;
 				this.SaveConfigValue("requireConnectionForControl", requireConnectionForControl);
 			}
 
 			GUILayout.EndHorizontal();
 
+			GUILayout.BeginHorizontal();
+
+			bool fixedPowerCost = GUITools.Toggle(ARConfiguration.FixedPowerCost, "Use Fixed Power Cost");
+			if (fixedPowerCost != ARConfiguration.FixedPowerCost)
+			{
+				ARConfiguration.FixedPowerCost = fixedPowerCost;
+				this.SaveConfigValue("fixedPowerCost", fixedPowerCost);
+			}
+
+			GUILayout.EndHorizontal();
+
+			GUILayout.BeginHorizontal();
+
+			bool prettyLines = GUITools.Toggle(ARConfiguration.PrettyLines, "Draw Pretty Lines");
+			if (prettyLines != ARConfiguration.PrettyLines)
+			{
+				ARConfiguration.PrettyLines = prettyLines;
+				this.SaveConfigValue("drawPrettyLines", prettyLines);
+			}
+
+			GUILayout.EndHorizontal();
+
+			if (requireLineOfSight)
+			{
+				GUILayout.BeginHorizontal();
+
+				double graceRatio = 1d - Math.Sqrt(ARConfiguration.RadiusRatio);
+				double newRatio;
+
+				GUILayout.Label(string.Format("Line of Sight 'Fudge Factor': {0:P0}", graceRatio));
+
+				GUILayout.EndHorizontal();
+
+				GUILayout.BeginHorizontal();
+
+				newRatio = GUILayout.HorizontalSlider((float)graceRatio, 0f, 1f, GUILayout.ExpandWidth(true));
+				newRatio = Math.Round(newRatio, 2);
+
+				if (newRatio != graceRatio)
+				{
+					ARConfiguration.RadiusRatio = (1d - newRatio) * (1d - newRatio);
+					this.SaveConfigValue("graceRatio", newRatio);
+				}
+
+				GUILayout.EndHorizontal();
+			}
+
 			GUILayout.EndVertical();
 
 			GUI.DragWindow();
 		}
 
-		public void Destroy()
-		{
+		public void OnDestroy()
+		{
+			GameEvents.onGameSceneLoadRequested.Remove(this.onSceneChangeRequested);
+
 			if (this.toolbarButton != null)
 			{
 				this.toolbarButton.Destroy();
 			}
+
+			if (this.appLauncherButton != null)
+			{
+				ApplicationLauncher.Instance.RemoveModApplication(this.appLauncherButton);
+			}
+		}
+
+		protected void onSceneChangeRequested(GameScenes scene)
+		{
+			if (scene != GameScenes.SPACECENTER)
+			{
+				print("ARConfiguration: Requesting Destruction.");
+				MonoBehaviour.Destroy(this);
+			}
+		}
+
+		private void toggleConfigWindow()
+		{
+			this.showConfigWindow = !this.showConfigWindow;
 		}
 
 		private T LoadConfigValue<T>(string key, T defaultValue)

--- a/ARFlightController.cs
+++ b/ARFlightController.cs
@@ -28,6 +28,7 @@
 
 using KSP;
 using System;
+using System.Collections.Generic;
 using ToadicusTools;
 using UnityEngine;
 
@@ -36,30 +37,59 @@
 	[KSPAddon(KSPAddon.Startup.Flight, false)]
 	public class ARFlightController : MonoBehaviour
 	{
-		#region Static Members
-		public static bool requireConnectionForControl;
+		#region Fields
+		protected Dictionary<ConnectionStatus, string> connectionTextures;
+		protected Dictionary<ConnectionStatus, Texture> appLauncherTextures;
+
+		protected ARMapRenderer mapRenderer;
+
+		protected IButton toolbarButton;
+
+		protected ApplicationLauncherButton appLauncherButton;
 		#endregion
 
 		#region Properties
-		public ControlTypes currentControlLock
-		{
-			get
-			{
-				if (this.lockID == string.Empty)
-				{
-					return ControlTypes.None;
-				}
-
-				return InputLockManager.GetControlLock(this.lockID);
-			}
-		}
-
-		public string lockID
+		public ConnectionStatus currentConnectionStatus
 		{
 			get;
 			protected set;
 		}
 
+		protected string currentConnectionTexture
+		{
+			get
+			{
+				return this.connectionTextures[this.currentConnectionStatus];
+			}
+		}
+
+		protected Texture currentAppLauncherTexture
+		{
+			get
+			{
+				return this.appLauncherTextures[this.currentConnectionStatus];
+			}
+		}
+
+		public ControlTypes currentControlLock
+		{
+			get
+			{
+				if (this.lockID == string.Empty)
+				{
+					return ControlTypes.None;
+				}
+
+				return InputLockManager.GetControlLock(this.lockID);
+			}
+		}
+
+		public string lockID
+		{
+			get;
+			protected set;
+		}
+
 		public ControlTypes lockSet
 		{
 			get
@@ -87,21 +117,84 @@
 		{
 			this.lockID = "ARConnectionRequired";
 
+			this.connectionTextures = new Dictionary<ConnectionStatus, string>();
+
+			this.connectionTextures[ConnectionStatus.None] = "AntennaRange/Textures/toolbarIconNoConnection";
+			this.connectionTextures[ConnectionStatus.Suboptimal] = "AntennaRange/Textures/toolbarIconSubOptimal";
+			this.connectionTextures[ConnectionStatus.Optimal] = "AntennaRange/Textures/toolbarIcon";
+
+			this.appLauncherTextures = new Dictionary<ConnectionStatus, Texture>();
+
+			this.appLauncherTextures[ConnectionStatus.None] =
+				GameDatabase.Instance.GetTexture("AntennaRange/Textures/appLauncherIconNoConnection", false);
+			this.appLauncherTextures[ConnectionStatus.Suboptimal] =
+				GameDatabase.Instance.GetTexture("AntennaRange/Textures/appLauncherIconSubOptimal", false);
+			this.appLauncherTextures[ConnectionStatus.Optimal] =
+				GameDatabase.Instance.GetTexture("AntennaRange/Textures/appLauncherIcon", false);
+
+			if (ToolbarManager.ToolbarAvailable)
+			{
+				this.toolbarButton = ToolbarManager.Instance.add("AntennaRange", "ARConnectionStatus");
+
+				this.toolbarButton.TexturePath = this.connectionTextures[ConnectionStatus.None];
+				this.toolbarButton.Text = "AntennaRange";
+				this.toolbarButton.Visibility = new GameScenesVisibility(GameScenes.FLIGHT);
+				this.toolbarButton.Enabled = false;
+			}
+
 			GameEvents.onGameSceneLoadRequested.Add(this.onSceneChangeRequested);
 			GameEvents.onVesselChange.Add(this.onVesselChange);
 		}
 
+		protected void Start()
+		{
+			this.mapRenderer = MapView.MapCamera.gameObject.AddComponent<ARMapRenderer>();
+		}
+
 		protected void FixedUpdate()
 		{
+			if (this.appLauncherButton == null && !ToolbarManager.ToolbarAvailable && ApplicationLauncher.Ready)
+			{
+				this.appLauncherButton = ApplicationLauncher.Instance.AddModApplication(
+					ApplicationLauncher.AppScenes.FLIGHT,
+					this.appLauncherTextures[ConnectionStatus.None]
+				);
+			}
+
+			Tools.DebugLogger log = Tools.DebugLogger.New(this);
+
+			VesselCommand availableCommand;
+
+			if (ARConfiguration.RequireConnectionForControl)
+			{
+				availableCommand = this.vessel.CurrentCommand();
+			}
+			else
+			{
+				availableCommand = VesselCommand.Crew;
+			}
+
+			log.AppendFormat("availableCommand: {0}\n\t" +
+				"(availableCommand & VesselCommand.Crew) == VesselCommand.Crew: {1}\n\t" +
+				"(availableCommand & VesselCommand.Probe) == VesselCommand.Probe: {2}\n\t" +
+				"vessel.HasConnectedRelay(): {3}",
+				(int)availableCommand,
+				(availableCommand & VesselCommand.Crew) == VesselCommand.Crew,
+				(availableCommand & VesselCommand.Probe) == VesselCommand.Probe,
+				vessel.HasConnectedRelay()
+			);
+
 			// If we are requiring a connection for control, the vessel does not have any adequately staffed pods,
 			// and the vessel does not have any connected relays...
 			if (
 				HighLogic.LoadedSceneIsFlight &&
-				requireConnectionForControl &&
+				ARConfiguration.RequireConnectionForControl &&
 				this.vessel != null &&
 				this.vessel.vesselType != VesselType.EVA &&
-				!this.vessel.hasCrewCommand() &&
-				!this.vessel.HasConnectedRelay())
+				!(
+				    (availableCommand & VesselCommand.Crew) == VesselCommand.Crew ||
+				    (availableCommand & VesselCommand.Probe) == VesselCommand.Probe && vessel.HasConnectedRelay()
+				))
 			{
 				// ...and if the controls are not currently locked...
 				if (currentControlLock == ControlTypes.None)
@@ -116,24 +209,129 @@
 				// ...unlock the controls.
 				InputLockManager.RemoveControlLock(this.lockID);
 			}
-		}
-
-		protected void Destroy()
+				
+			if (
+				(this.toolbarButton != null || this.appLauncherButton != null) &&
+				HighLogic.LoadedSceneIsFlight &&
+				FlightGlobals.ActiveVessel != null
+			)
+			{
+				log.Append("Checking vessel relay status.\n");
+
+				List<ModuleLimitedDataTransmitter> relays =
+					FlightGlobals.ActiveVessel.getModulesOfType<ModuleLimitedDataTransmitter>();
+
+				log.AppendFormat("\t...found {0} relays\n", relays.Count);
+
+				bool vesselCanTransmit = false;
+				bool vesselHasOptimalRelay = false;
+
+				foreach (ModuleLimitedDataTransmitter relay in relays)
+				{
+					log.AppendFormat("\tvesselCanTransmit: {0}, vesselHasOptimalRelay: {1}\n",
+						vesselCanTransmit, vesselHasOptimalRelay);
+
+					log.AppendFormat("\tChecking relay {0}\n" +
+						"\t\tCanTransmit: {1}, transmitDistance: {2}, nominalRange: {3}\n",
+						relay,
+						relay.CanTransmit(),
+						relay.transmitDistance,
+						relay.nominalRange
+					);
+
+					bool relayCanTransmit = relay.CanTransmit();
+
+					if (!vesselCanTransmit && relayCanTransmit)
+					{
+						vesselCanTransmit = true;
+					}
+
+					if (!vesselHasOptimalRelay &&
+						relayCanTransmit &&
+						relay.transmitDistance <= (double)relay.nominalRange)
+					{
+						vesselHasOptimalRelay = true;
+					}
+
+					if (vesselCanTransmit && vesselHasOptimalRelay)
+					{
+						break;
+					}
+				}
+
+				log.AppendFormat("Done checking.  vesselCanTransmit: {0}, vesselHasOptimalRelay: {1}\n",
+					vesselCanTransmit, vesselHasOptimalRelay);
+
+				if (vesselHasOptimalRelay)
+				{
+					this.currentConnectionStatus = ConnectionStatus.Optimal;
+				}
+				else if (vesselCanTransmit)
+				{
+					this.currentConnectionStatus = ConnectionStatus.Suboptimal;
+				}
+				else
+				{
+					this.currentConnectionStatus = ConnectionStatus.None;
+				}
+
+				log.AppendFormat("currentConnectionStatus: {0}, setting texture to {1}",
+					this.currentConnectionStatus, this.currentConnectionTexture);
+
+				if (this.toolbarButton != null)
+				{
+					this.toolbarButton.TexturePath = this.currentConnectionTexture;
+
+					if (this.currentConnectionStatus == ConnectionStatus.None)
+					{
+						this.toolbarButton.Important = true;
+					}
+					else
+					{
+						this.toolbarButton.Important = false;
+					}
+				}
+				if (this.appLauncherButton != null)
+				{
+					this.appLauncherButton.SetTexture(this.currentAppLauncherTexture);
+				}
+			}
+
+			log.Print();
+		}
+
+		protected void OnDestroy()
 		{
 			InputLockManager.RemoveControlLock(this.lockID);
+
+			if (this.mapRenderer != null)
+			{
+				GameObject.Destroy(this.mapRenderer);
+			}
+
+			if (this.toolbarButton != null)
+			{
+				this.toolbarButton.Destroy();
+			}
+
+			if (this.appLauncherButton != null)
+			{
+				ApplicationLauncher.Instance.RemoveModApplication(this.appLauncherButton);
+				this.appLauncherButton = null;
+			}
 
 			GameEvents.onGameSceneLoadRequested.Remove(this.onSceneChangeRequested);
 			GameEvents.onVesselChange.Remove(this.onVesselChange);
+
+			print("ARFlightController: Destroyed.");
 		}
 		#endregion
 
 		#region Event Handlers
 		protected void onSceneChangeRequested(GameScenes scene)
 		{
-			if (scene != GameScenes.FLIGHT)
-			{
-				InputLockManager.RemoveControlLock(this.lockID);
-			}
+			print("ARFlightController: Requesting Destruction.");
+			MonoBehaviour.Destroy(this);
 		}
 
 		protected void onVesselChange(Vessel vessel)
@@ -141,7 +339,13 @@
 			InputLockManager.RemoveControlLock(this.lockID);
 		}
 		#endregion
+
+		public enum ConnectionStatus
+		{
+			None,
+			Suboptimal,
+			Optimal
+		}
 	}
 }
 
-

file:b/ARMapRenderer.cs (new)
--- /dev/null
+++ b/ARMapRenderer.cs
@@ -1,1 +1,282 @@
-
+// AntennaRange
+//
+// ARMapRenderer.cs
+//
+// Copyright © 2014, toadicus
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice,
+//    this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice,
+//    this list of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be used
+//    to endorse or promote products derived from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+using KSP;
+using System;
+using System.Collections.Generic;
+using ToadicusTools;
+using UnityEngine;
+
+namespace AntennaRange
+{
+	public class ARMapRenderer : MonoBehaviour
+	{
+		#region Fields
+		private Dictionary<Guid, LineRenderer> vesselLineRenderers;
+		private Dictionary<Guid, bool> vesselFrameCache;
+		#endregion
+
+		#region Properties
+		public LineRenderer this[Guid idx]
+		{
+			get
+			{
+				if (this.vesselLineRenderers == null)
+				{
+					this.vesselLineRenderers = new Dictionary<Guid, LineRenderer>();
+				}
+
+				if (!this.vesselLineRenderers.ContainsKey(idx))
+				{
+					GameObject obj = new GameObject();
+					obj.layer = 31;
+
+					LineRenderer lr = obj.AddComponent<LineRenderer>();
+
+					lr.SetColors(Color.green, Color.green);
+					lr.material = new Material(Shader.Find("Particles/Additive"));
+					lr.SetVertexCount(2);
+
+					this.vesselLineRenderers[idx] = lr;
+				}
+
+				return this.vesselLineRenderers[idx];
+			}
+		}
+		#endregion
+
+		#region MonoBehaviour Lifecycle
+		private void Awake()
+		{
+			if (ARConfiguration.PrettyLines)
+			{
+				this.vesselLineRenderers = new Dictionary<Guid, LineRenderer>();
+				this.vesselFrameCache = new Dictionary<Guid, bool>();
+			}
+		}
+
+		private void OnPreCull()
+		{
+			if (!HighLogic.LoadedSceneIsFlight || !MapView.MapIsEnabled || !ARConfiguration.PrettyLines)
+			{
+				this.Cleanup();
+
+				return;
+			}
+
+			Tools.DebugLogger log = Tools.DebugLogger.New(this);
+
+			try
+			{
+				log.AppendFormat("OnPreCull.\n");
+
+				log.AppendFormat("\tMapView: Draw3DLines: {0}\n" +
+					"\tMapView.MapCamera.camera.fieldOfView: {1}\n" +
+					"\tMapView.MapCamera.Distance: {2}\n",
+					MapView.Draw3DLines,
+					MapView.MapCamera.camera.fieldOfView,
+					MapView.MapCamera.Distance
+				);
+
+				this.vesselFrameCache.Clear();
+
+				log.AppendLine("vesselFrameCache cleared.");
+
+				if (FlightGlobals.ready && FlightGlobals.Vessels != null)
+				{
+					log.AppendLine("FlightGlobals ready and Vessels list not null.");
+
+					foreach (Vessel vessel in FlightGlobals.Vessels)
+					{
+						if (vessel == null)
+						{
+							log.AppendFormat("Skipping vessel {0} altogether because it is null.\n");
+							continue;
+						}
+
+						log.AppendFormat("Checking vessel {0}.\n", vessel.vesselName);
+
+						switch (vessel.vesselType)
+						{
+							case VesselType.Debris:
+							case VesselType.EVA:
+							case VesselType.Unknown:
+							case VesselType.SpaceObject:
+								log.AppendFormat("\tDiscarded because vessel is of invalid type {0}\n",
+									vessel.vesselType);
+								continue;
+						}
+
+						log.Append("\tChecking connection status...\n");
+
+						/*if (vessel.HasConnectedRelay())
+						{
+							log.AppendLine("\tHas a connection, checking for the best relay to use for the line.");*/
+
+							IAntennaRelay vesselRelay = null;
+							float bestScore = float.PositiveInfinity;
+							float relayScore = float.NaN;
+
+							foreach (IAntennaRelay relay in RelayDatabase.Instance[vessel].Values)
+							{
+								relayScore = (float)relay.transmitDistance / relay.maxTransmitDistance;
+
+								if (relayScore < bestScore)
+								{
+									bestScore = relayScore;
+									vesselRelay = relay as IAntennaRelay;
+								}
+							}
+
+							if (vesselRelay != null)
+							{
+								log.AppendFormat("\t...picked relay {0} with a score of {1}", 
+									vesselRelay, relayScore
+								);
+
+								this.SetRelayVertices(vesselRelay);
+							}
+						/*}
+						else if (this.vesselLineRenderers.ContainsKey(vessel.id))
+						{
+							log.AppendLine("\tDisabling line because vessel has no connection.");
+							this[vessel.id].enabled = false;
+						}*/
+					}
+				}
+			}
+			catch (Exception)
+			{
+				this.Cleanup();
+			}
+			#if DEBUG
+			finally
+			{
+				log.Print();
+			}
+			#endif
+		}
+
+		private void OnDestroy()
+		{
+			this.Cleanup();
+
+			print("ARMapRenderer: Destroyed.");
+		}
+		#endregion
+
+		private void SetRelayVertices(IAntennaRelay relay)
+		{
+			if (relay == null)
+			{
+				return;
+			}
+
+			LineRenderer renderer = this[relay.vessel.id];
+
+			Vector3d start;
+			Vector3d end;
+
+			renderer.enabled = true;
+
+			if (!relay.CanTransmit())
+			{
+				renderer.SetColors(Color.red, Color.red);
+			}
+			else
+			{
+				if (relay.transmitDistance < relay.nominalTransmitDistance)
+				{
+					renderer.SetColors(Color.green, Color.green);
+				}
+				else
+				{
+					renderer.SetColors(Color.yellow, Color.yellow);
+				}
+			}
+
+			start = ScaledSpace.LocalToScaledSpace(relay.vessel.GetWorldPos3D());
+
+			if (relay.KerbinDirect)
+			{
+				end = ScaledSpace.LocalToScaledSpace(AntennaRelay.Kerbin.position);
+			}
+			else
+			{
+				if (relay.targetRelay == null)
+				{
+					return;
+				}
+				end = ScaledSpace.LocalToScaledSpace(relay.targetRelay.vessel.GetWorldPos3D());
+			}
+
+			float lineWidth;
+
+			if (MapView.Draw3DLines)
+			{
+				lineWidth = 0.004f * MapView.MapCamera.Distance;
+			}
+			else
+			{
+				lineWidth = 1f;
+
+				start = MapView.MapCamera.camera.WorldToScreenPoint(start);
+				end = MapView.MapCamera.camera.WorldToScreenPoint(end);
+
+				float d = Screen.height / 2f + 0.01f;
+				start.z = start.z >= 0f ? d : -d;
+				end.z = end.z >= 0f ? d : -d;
+			}
+
+			renderer.SetWidth(lineWidth, lineWidth);
+
+			renderer.SetPosition(0, start);
+			renderer.SetPosition(1, end);
+		}
+
+		public void Cleanup()
+		{
+			if (this.vesselLineRenderers != null && this.vesselLineRenderers.Count > 0)
+			{
+				foreach (LineRenderer lineRenderer in this.vesselLineRenderers.Values)
+				{
+					lineRenderer.enabled = false;
+					GameObject.Destroy(lineRenderer.gameObject);
+				}
+				this.vesselLineRenderers.Clear();
+			}
+
+			if (this.vesselFrameCache != null && this.vesselFrameCache.Count > 0)
+			{
+				this.vesselFrameCache.Clear();
+			}
+		}
+	}
+}
+
+

file:a/AntennaRange.cfg (deleted)
--- a/AntennaRange.cfg
+++ /dev/null
@@ -1,72 +1,1 @@
-// AntennaRange
-//
-// AntennaRange.cfg
-//
-// Copyright © 2014, toadicus
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without modification,
-// are permitted provided that the following conditions are met:
-//
-// 1. Redistributions of source code must retain the above copyright notice,
-//    this list of conditions and the following disclaimer.
-//
-// 2. Redistributions in binary form must reproduce the above copyright notice,
-//    this list of conditions and the following disclaimer in the documentation and/or other
-//    materials provided with the distribution.
-//
-// 3. Neither the name of the copyright holder nor the names of its contributors may be used
-//    to endorse or promote products derived from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
-// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This software uses the ModuleManager library © 2013 ialdabaoth, used under a Creative Commons Attribution-ShareAlike
-// 3.0 Uported License.
-//
-// Specifications:
-// nominalRange:	The distance from Kerbin at which the antenna will perform exactly as prescribed by
-//					packetResourceCost and packetSize.
-// maxPowerFactor:	The multiplier on packetResourceCost that defines the maximum power output of the antenna.  When the
-//					power cost exceeds packetResourceCost * maxPowerFactor, transmission will fail.
-// maxDataFactor:	The multipler on packetSize that defines the maximum data bandwidth of the antenna.
-// 
 
-@PART[longAntenna]:FOR[AntennaRange]:NEEDS[!RemoteTech2]
-{
-	@MODULE[ModuleDataTransmitter]
-	{
-		@name = ModuleLimitedDataTransmitter
-		nominalRange = 1500000
-		maxPowerFactor = 8
-		maxDataFactor = 4
-	}
-}
-
-@PART[mediumDishAntenna]:FOR[AntennaRange]:NEEDS[!RemoteTech2]
-{
-	@MODULE[ModuleDataTransmitter]
-	{
-		@name = ModuleLimitedDataTransmitter
-		nominalRange = 30000000
-		maxPowerFactor = 8
-		maxDataFactor = 4
-	}
-}
-
-@PART[commDish]:FOR[AntennaRange]:NEEDS[!RemoteTech2]
-{
-	@MODULE[ModuleDataTransmitter]
-	{
-		@name = ModuleLimitedDataTransmitter
-		nominalRange = 80000000000
-		maxPowerFactor = 8
-		maxDataFactor = 4
-	}
-}
-

--- a/AntennaRange.csproj
+++ b/AntennaRange.csproj
@@ -9,7 +9,7 @@
     <OutputType>Library</OutputType>
     <RootNamespace>AntennaRange</RootNamespace>
     <AssemblyName>AntennaRange</AssemblyName>
-    <ReleaseVersion>1.1</ReleaseVersion>
+    <ReleaseVersion>1.3</ReleaseVersion>
     <SynchReleaseVersion>false</SynchReleaseVersion>
     <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
     <UseMSBuildEngine>False</UseMSBuildEngine>
@@ -25,8 +25,7 @@
     <ConsolePause>false</ConsolePause>
     <CustomCommands>
       <CustomCommands>
-        <Command type="AfterBuild" command="xcopy /y ${ProjectDir}\AntennaRange.cfg C:\Users\andy\Games\KSP_win\GameData\AntennaRange\" />
-        <Command type="AfterBuild" command="xcopy /y ${TargetFile} C:\Users\andy\Games\KSP_win\GameData\AntennaRange\" />
+        <Command type="AfterBuild" command="xcopy /y ${TargetFile} ${ProjectDir}\GameData\AntennaRange\" />
       </CustomCommands>
     </CustomCommands>
   </PropertyGroup>
@@ -38,8 +37,7 @@
     <ConsolePause>false</ConsolePause>
     <CustomCommands>
       <CustomCommands>
-        <Command type="AfterBuild" command="xcopy /y ${ProjectDir}\AntennaRange.cfg C:\Users\andy\Games\KSP_win\GameData\AntennaRange\" />
-        <Command type="AfterBuild" command="xcopy /y ${TargetFile} C:\Users\andy\Games\KSP_win\GameData\AntennaRange\" />
+        <Command type="AfterBuild" command="xcopy /y ${TargetFile} ${ProjectDir}\GameData\AntennaRange\" />
       </CustomCommands>
     </CustomCommands>
   </PropertyGroup>
@@ -54,7 +52,7 @@
     <ConsolePause>false</ConsolePause>
     <CustomCommands>
       <CustomCommands>
-        <Command type="AfterBuild" command="cp -afv ${TargetFile} ${ProjectDir}/${ProjectName}.cfg /opt/games/KSP_linux/GameData/${ProjectName}/" />
+        <Command type="AfterBuild" command="cp -afv ${TargetFile} ${ProjectDir}/GameData/${ProjectName}/" />
       </CustomCommands>
     </CustomCommands>
   </PropertyGroup>
@@ -65,7 +63,7 @@
     <WarningLevel>4</WarningLevel>
     <CustomCommands>
       <CustomCommands>
-        <Command type="AfterBuild" command="cp -afv ${TargetFile} ${ProjectDir}/${ProjectName}.cfg /opt/games/KSP_linux/GameData/${ProjectName}/" />
+        <Command type="AfterBuild" command="cp -afv ${TargetFile} ${ProjectDir}/GameData/${ProjectName}/" />
       </CustomCommands>
     </CustomCommands>
     <ConsolePause>false</ConsolePause>
@@ -80,13 +78,9 @@
     <Compile Include="RelayExtensions.cs" />
     <Compile Include="ARConfiguration.cs" />
     <Compile Include="ARFlightController.cs" />
+    <Compile Include="ARMapRenderer.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
-  <ItemGroup>
-    <None Include="AntennaRange.cfg">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
-  </ItemGroup>
   <ItemGroup>
     <Reference Include="Assembly-CSharp">
       <HintPath>..\_KSPAssemblies\Assembly-CSharp.dll</HintPath>
@@ -107,4 +101,8 @@
       <Name>ToadicusTools</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="GameData\AntennaRange\AntennaRange.cfg" />
+    <None Include="GameData\AntennaRange\ATM_AntennaRange.cfg" />
+  </ItemGroup>
 </Project>

--- a/AntennaRelay.cs
+++ b/AntennaRelay.cs
@@ -31,18 +31,31 @@
 using System.Linq;
 using ToadicusTools;
 
+// @DONE TODO: Retool nearestRelay to always contain the nearest relay, even if out of range.
+// @DONE TODO: Retool CanTransmit to not rely on nearestRelay == null.
+// TODO: Track occluded vessels somehow.
+
 namespace AntennaRange
 {
 	public class AntennaRelay
 	{
-		public static bool requireLineOfSight;
-
 		// We don't have a Bard, so we'll hide Kerbin here.
-		protected CelestialBody Kerbin;
-
-		protected CelestialBody _firstOccludingBody;
-
-		protected IAntennaRelay _nearestRelayCache;
+		private static CelestialBody _Kerbin;
+		public static CelestialBody Kerbin
+		{
+			get
+			{
+				if (_Kerbin == null && FlightGlobals.ready)
+				{
+					_Kerbin = FlightGlobals.GetHomeBody();
+				}
+
+				return _Kerbin;
+			}
+		}
+
+		protected bool canTransmit;
+
 		protected IAntennaRelay moduleRef;
 
 		protected System.Diagnostics.Stopwatch searchTimer;
@@ -66,33 +79,29 @@
 		/// <value>The nearest relay</value>
 		public IAntennaRelay nearestRelay
 		{
-			get
-			{
-				if (this.searchTimer.IsRunning &&
-					this.searchTimer.ElapsedMilliseconds > this.millisecondsBetweenSearches)
-				{
-					this._nearestRelayCache = this.FindNearestRelay();
-					this.searchTimer.Restart();
-				}
-
-				return this._nearestRelayCache;
-			}
-			protected set
-			{
-				this._nearestRelayCache = value;
-			}
-		}
-
-		/// <summary>
-		/// Gets the first occluding body.
-		/// </summary>
-		/// <value>The first occluding body.</value>
-		public CelestialBody firstOccludingBody
-		{
-			get
-			{
-				return this._firstOccludingBody;
-			}
+			get;
+			protected set;
+		}
+
+		public IAntennaRelay bestOccludedRelay
+		{
+			get;
+			protected set;
+		}
+
+		public IAntennaRelay targetRelay
+		{
+			get;
+			protected set;
+		}
+
+		/// <summary>
+		/// Gets the first <see cref="CelestialBody"/> found to be blocking line of sight.
+		/// </summary>
+		public virtual CelestialBody firstOccludingBody
+		{
+			get;
+			protected set;
 		}
 
 		/// <summary>
@@ -103,20 +112,23 @@
 		{
 			get
 			{
-				this.nearestRelay = this.FindNearestRelay();
-
-				// If there is no available relay nearby...
-				if (this.nearestRelay == null)
-				{
-					// .. return the distance to Kerbin
-					return this.DistanceTo(this.Kerbin);
+				this.FindNearestRelay();
+
+				if (this.KerbinDirect || this.targetRelay == null)
+				{
+					return this.DistanceTo(Kerbin);
 				}
 				else
 				{
-					/// ...otherwise, return the distance to the nearest available relay.
-					return this.DistanceTo(nearestRelay);
-				}
-			}
+					return this.DistanceTo(this.targetRelay);
+				}
+			}
+		}
+
+		public virtual double nominalTransmitDistance
+		{
+			get;
+			set;
 		}
 
 		/// <summary>
@@ -140,77 +152,75 @@
 			protected set;
 		}
 
+		public virtual bool KerbinDirect
+		{
+			get;
+			protected set;
+		}
+
 		/// <summary>
 		/// Determines whether this instance can transmit.
 		/// </summary>
 		/// <returns><c>true</c> if this instance can transmit; otherwise, <c>false</c>.</returns>
 		public virtual bool CanTransmit()
 		{
-			if (
-				this.transmitDistance > this.maxTransmitDistance ||
-				(
-					requireLineOfSight &&
-					this.nearestRelay == null &&
-					!this.vessel.hasLineOfSightTo(this.Kerbin, out this._firstOccludingBody)
-				)
-			)
-			{
-				return false;
+			this.FindNearestRelay();
+			return this.canTransmit;
+		}
+
+		/// <summary>
+		/// Finds the nearest relay.
+		/// </summary>
+		/// <returns>The nearest relay or null, if no relays in range.</returns>
+		private void FindNearestRelay()
+		{
+			if (!this.searchTimer.IsRunning || this.searchTimer.ElapsedMilliseconds > this.millisecondsBetweenSearches)
+			{
+				this.searchTimer.Reset();
 			}
 			else
 			{
-				return true;
-			}
-		}
-
-		/// <summary>
-		/// Finds the nearest relay.
-		/// </summary>
-		/// <returns>The nearest relay or null, if no relays in range.</returns>
-		public IAntennaRelay FindNearestRelay()
-		{
-			if (this.searchTimer.IsRunning && this.searchTimer.ElapsedMilliseconds < this.millisecondsBetweenSearches)
-			{
-				return this.nearestRelay;
-			}
-
-			if (this.searchTimer.IsRunning)
-			{
-				this.searchTimer.Stop();
-				this.searchTimer.Reset();
-			}
-
-			this.searchTimer.Start();
-
-			Tools.PostDebugMessage(string.Format(
-				"{0}: finding nearest relay for {1} ({2})",
-				this.GetType().Name,
-				this,
-				this.vessel.id
-			));
-
-			this._firstOccludingBody = null;
+				return;
+			}
+
+			// Skip vessels that have already been checked for a nearest relay this pass.
+			if (RelayDatabase.Instance.CheckedVesselsTable.ContainsKey(this.vessel.id))
+			{
+				return;
+			}
+
+			if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
+			{
+				Tools.PostLogMessage(string.Format(
+					"{0}: finding nearest relay for {1}",
+					this.GetType().Name,
+					this.ToString()
+				));
+			}
 
 			// Set this vessel as checked, so that we don't check it again.
 			RelayDatabase.Instance.CheckedVesselsTable[vessel.id] = true;
 
-			double nearestSqrDistance = double.PositiveInfinity;
-			IAntennaRelay _nearestRelay = null;
+			// Blank everything we're trying to find before the search.
+			this.firstOccludingBody = null;
+			this.bestOccludedRelay = null;
+			this.targetRelay = null;
+			this.nearestRelay = null;
+
+			CelestialBody bodyOccludingBestOccludedRelay = null;
+
+			double nearestRelaySqrDistance = double.PositiveInfinity;
+			double bestOccludedSqrDistance = double.PositiveInfinity;
+			double maxTransmitSqrDistance = this.maxTransmitDistance * this.maxTransmitDistance;
 
 			/*
 			 * Loop through all the vessels and exclude this vessel, vessels of the wrong type, and vessels that are too
 			 * far away.  When we find a candidate, get through its antennae for relays which have not been checked yet
-			 * and that can transmit.  Once we find a suitable candidate, assign it to _nearestRelay for comparison
+			 * and that can transmit.  Once we find a suitable candidate, assign it to nearestRelay for comparison
 			 * against future finds.
 			 * */
 			foreach (Vessel potentialVessel in FlightGlobals.Vessels)
 			{
-				// Skip vessels that have already been checked for a nearest relay this pass.
-				if (RelayDatabase.Instance.CheckedVesselsTable.ContainsKey(potentialVessel.id))
-				{
-					continue;
-				}
-
 				// Skip vessels of the wrong type.
 				switch (potentialVessel.vesselType)
 				{
@@ -230,63 +240,277 @@
 					continue;
 				}
 
+				// Find the distance from here to the vessel...
+				double potentialSqrDistance = this.sqrDistanceTo(potentialVessel);
+
+				CelestialBody fob = null;
+
 				// Skip vessels to which we do not have line of sight.
-				if (requireLineOfSight && !this.vessel.hasLineOfSightTo(potentialVessel, out this._firstOccludingBody))
-				{
-					Tools.PostDebugMessage(
-						this,
-						"Vessel {0} discarded because we do not have line of sight.",
-						potentialVessel.vesselName
-					);
+				if (
+					ARConfiguration.RequireLineOfSight &&
+					!this.vessel.hasLineOfSightTo(potentialVessel, out fob, ARConfiguration.RadiusRatio)
+				)
+				{
+					this.firstOccludingBody = fob;
+
+					if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
+					{
+						Tools.PostLogMessage("{6}: Vessel {0} discarded because we do not have line of sight." +
+							"\npotentialSqrDistance: {1}, bestOccludedSqrDistance: {2}, maxTransmitSqrDistance: {3}" +
+							"\npotentialSqrDistance < bestOccludedSqrDistance: {4}" +
+							"\npotentialSqrDistance < (this.maxTransmitDistance * this.maxTransmitDistance): {5}",
+							potentialVessel.vesselName,
+							potentialSqrDistance, bestOccludedSqrDistance, this.maxTransmitDistance * this.maxTransmitDistance,
+							potentialSqrDistance < bestOccludedSqrDistance,
+							potentialSqrDistance < (this.maxTransmitDistance * this.maxTransmitDistance),
+							this.ToString()
+						);
+					}
+
+					if (
+						(potentialSqrDistance < bestOccludedSqrDistance) &&
+						(potentialSqrDistance < maxTransmitSqrDistance)
+					)
+					{
+						if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
+						{
+							Tools.PostLogMessage("{0}: Checking {1} relays on {2}.",
+								this.ToString(),
+								potentialVessel.GetAntennaRelays().Count(),
+								potentialVessel
+							);
+						}
+
+						foreach (IAntennaRelay occludedRelay in potentialVessel.GetAntennaRelays())
+						{
+							if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
+							{
+								Tools.PostLogMessage(this.ToString() +  " Checking candidate for bestOccludedRelay: {0}" +
+									"\n\tCanTransmit: {1}", occludedRelay, occludedRelay.CanTransmit());
+							}
+
+							if (occludedRelay.CanTransmit())
+							{
+								this.bestOccludedRelay = occludedRelay;
+								bodyOccludingBestOccludedRelay = fob;
+								bestOccludedSqrDistance = potentialSqrDistance;
+
+								if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
+								{
+									Tools.PostLogMessage(this.ToString() + " Found new bestOccludedRelay: {0}" +
+										"\nfirstOccludingBody: {1}" +
+										"\nbestOccludedSqrDistance: {2}",
+										occludedRelay,
+										fob,
+										potentialSqrDistance
+									);
+								}
+								break;
+							}
+						}
+					}
+
 					continue;
 				}
 
-				// Find the distance from here to the vessel...
-				double potentialSqrDistance = (potentialVessel.GetWorldPos3D() - vessel.GetWorldPos3D()).sqrMagnitude;
-
 				/*
-				 * ...so that we can skip the vessel if it is further away than Kerbin, our transmit distance, or a
-				 * vessel we've already checked.
+				 * ...so that we can skip the vessel if it is further away than a vessel we've already checked.
 				 * */
-				if (
-					potentialSqrDistance > Tools.Min(
-						this.maxTransmitDistance * this.maxTransmitDistance,
-						nearestSqrDistance,
-						this.vessel.sqrDistanceTo(Kerbin)
-					)
-				)
-				{
-					Tools.PostDebugMessage(
-						this,
-						"Vessel {0} discarded because it is out of range, or farther than another relay.",
-						potentialVessel.vesselName
-					);
+				if (potentialSqrDistance > nearestRelaySqrDistance)
+				{
+					if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
+					{
+						Tools.PostLogMessage("{0}: Vessel {1} discarded because it is out of range, or farther than another relay.",
+							this.ToString(),
+							potentialVessel.vesselName
+						);
+					}
 					continue;
 				}
 
-				nearestSqrDistance = potentialSqrDistance;
+				nearestRelaySqrDistance = potentialSqrDistance;
 
 				foreach (IAntennaRelay potentialRelay in potentialVessel.GetAntennaRelays())
 				{
-					if (potentialRelay.CanTransmit())
-					{
-						_nearestRelay = potentialRelay;
-						Tools.PostDebugMessage(string.Format("{0}: found new best relay {1} ({2})",
-							this.GetType().Name,
-							_nearestRelay.ToString(),
-							_nearestRelay.vessel.id
-						));
+					if (potentialRelay.CanTransmit() && potentialRelay.targetRelay != this)
+					{
+						this.nearestRelay = potentialRelay;
+
+						if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
+						{
+							Tools.PostLogMessage(string.Format("{0}: found new best relay {1} ({2})",
+								this.ToString(),
+								this.nearestRelay.ToString(),
+								this.nearestRelay.vessel.id
+							));
+						}
 						break;
 					}
 				}
 			}
+
+			CelestialBody bodyOccludingKerbin = null;
+
+			double kerbinSqrDistance = this.vessel.DistanceTo(Kerbin) - Kerbin.Radius;
+			kerbinSqrDistance *= kerbinSqrDistance;
+
+			System.Text.StringBuilder log = new System.Text.StringBuilder();
+
+			log.AppendFormat("{0} ({1}): Search done, figuring status.", this.ToString(), this.GetType().Name);
+
+			// If we don't have LOS to Kerbin, focus on relays
+			if (!this.vessel.hasLineOfSightTo(Kerbin, out bodyOccludingKerbin, ARConfiguration.RadiusRatio))
+			{
+				log.AppendFormat("\n\tKerbin LOS is blocked by {0}.", bodyOccludingKerbin.bodyName);
+
+				// nearestRelaySqrDistance will be infinity if all relays are occluded or none exist.
+				// Therefore, this will only be true if a valid relay is in range.
+				if (nearestRelaySqrDistance <= maxTransmitSqrDistance)
+				{
+					log.AppendFormat("\n\tCan transmit to nearby relay {0} ({1} <= {2}).",
+						this.nearestRelay == null ? "null" : this.nearestRelay.ToString(),
+							nearestRelaySqrDistance, maxTransmitSqrDistance);
+
+					this.KerbinDirect = false;
+					this.canTransmit = true;
+					this.targetRelay = this.nearestRelay;
+				}
+				// If this isn't true, we can't transmit, but pick a second best of bestOccludedRelay and Kerbin anyway
+				else
+				{
+					log.AppendFormat("\n\tCan't transmit to nearby relay {0} ({1} > {2}).",
+						this.nearestRelay == null ? "null" : this.nearestRelay.ToString(),
+							nearestRelaySqrDistance, maxTransmitSqrDistance);
+
+					this.canTransmit = false;
+
+					// If the best occluded relay is closer than Kerbin, target it.
+					if (bestOccludedSqrDistance < kerbinSqrDistance)
+					{
+						log.AppendFormat("\n\t\tPicking occluded relay {0} as target ({1} < {2}).",
+							this.bestOccludedRelay == null ? "null" : this.bestOccludedRelay.ToString(),
+							bestOccludedSqrDistance, kerbinSqrDistance);
+
+						this.KerbinDirect = false;
+						this.targetRelay = this.bestOccludedRelay;
+						this.firstOccludingBody = bodyOccludingBestOccludedRelay;
+					}
+					// Otherwise, target Kerbin and report the first body blocking it.
+					else
+					{
+						log.AppendFormat("\n\t\tPicking Kerbin as target ({0} >= {1}).",
+							bestOccludedSqrDistance, kerbinSqrDistance);
+
+						this.KerbinDirect = true;
+						this.targetRelay = null;
+						this.firstOccludingBody = bodyOccludingKerbin;
+					}
+				}
+			}
+			// If we do have LOS to Kerbin, try to prefer the closest of nearestRelay and Kerbin
+			else
+			{
+				log.AppendFormat("\n\tKerbin is in LOS.");
+
+				// If the nearest relay is closer than Kerbin and in range, transmit to it.
+				if (nearestRelaySqrDistance <= maxTransmitSqrDistance)
+				{
+					log.AppendFormat("\n\tCan transmit to nearby relay {0} ({1} <= {2}).",
+						this.nearestRelay == null ? "null" : this.nearestRelay.ToString(),
+							nearestRelaySqrDistance, maxTransmitSqrDistance);
+
+					this.canTransmit = true;
+
+					// If the nearestRelay is closer than Kerbin, use it.
+					if (nearestRelaySqrDistance < kerbinSqrDistance)
+					{
+						log.AppendFormat("\n\tPicking relay {0} over Kerbin ({1} < {2}).",
+							this.nearestRelay == null ? "null" : this.nearestRelay.ToString(),
+							nearestRelaySqrDistance, kerbinSqrDistance);
+
+						this.KerbinDirect = false;
+						this.targetRelay = this.nearestRelay;
+					}
+					// Otherwise, Kerbin is closer, so use it.
+					else
+					{
+						log.AppendFormat("\n\tBut picking Kerbin over nearby relay {0} ({1} >= {2}).",
+							this.nearestRelay == null ? "null" : this.nearestRelay.ToString(),
+								nearestRelaySqrDistance, kerbinSqrDistance);
+
+						this.KerbinDirect = true;
+						this.targetRelay = null;
+					}
+				}
+				// If the nearest relay is out of range, we still need to check on Kerbin.
+				else
+				{
+					log.AppendFormat("\n\tCan't transmit to nearby relay {0} ({1} > {2}).",
+						this.nearestRelay == null ? "null" : this.nearestRelay.ToString(),
+							nearestRelaySqrDistance, maxTransmitSqrDistance);
+
+					// If Kerbin is in range, use it.
+					if (kerbinSqrDistance <= maxTransmitSqrDistance)
+					{
+						log.AppendFormat("\n\tCan transmit to Kerbin ({0} <= {1}).",
+							kerbinSqrDistance, maxTransmitSqrDistance);
+
+						this.canTransmit = true;
+						this.KerbinDirect = true;
+						this.targetRelay = null;
+					}
+					// If Kerbin is out of range and the nearest relay is out of range, pick a second best between
+					// Kerbin and bestOccludedRelay
+					else
+					{
+						log.AppendFormat("\n\tCan't transmit to Kerbin ({0} > {1}).",
+							kerbinSqrDistance, maxTransmitSqrDistance);
+
+						this.canTransmit = false;
+
+						// If the best occluded relay is closer than Kerbin, use it.
+						// Since bestOccludedSqrDistance is infinity if there are no occluded relays,
+						// this is safe
+						if (bestOccludedSqrDistance < kerbinSqrDistance)
+						{
+							log.AppendFormat("\n\t\tPicking occluded relay {0} as target ({1} < {2}).",
+								this.bestOccludedRelay == null ? "null" : this.bestOccludedRelay.ToString(),
+									bestOccludedSqrDistance, kerbinSqrDistance);
+
+							this.KerbinDirect = false;
+							this.targetRelay = bestOccludedRelay;
+							this.firstOccludingBody = bodyOccludingBestOccludedRelay;
+						}
+						// Otherwise, target Kerbin.  Since we have LOS, blank the first occluding body.
+						else
+						{
+							log.AppendFormat("\n\t\tPicking Kerbin as target ({0} >= {1}).",
+								bestOccludedSqrDistance, kerbinSqrDistance);
+
+							this.KerbinDirect = true;
+							this.targetRelay = null;
+							this.firstOccludingBody = null;
+						}
+					}
+				}
+			}
+
+			log.AppendFormat("\n{0}: Status determination complete.", this.ToString());
+
+			Tools.PostLogMessage(log.ToString());
 
 			// Now that we're done with our recursive CanTransmit checks, flag this relay as not checked so it can be
 			// used next time.
 			RelayDatabase.Instance.CheckedVesselsTable.Remove(vessel.id);
-
-			// Return the nearest available relay, or null if there are no available relays nearby.
-			return _nearestRelay;
+		}
+
+		public override string ToString()
+		{
+			if (this is ProtoAntennaRelay)
+			{
+				return (this as ProtoAntennaRelay).ToString();
+			}
+			return this.moduleRef.ToString();
 		}
 
 		/// <summary>
@@ -298,22 +522,7 @@
 			this.moduleRef = module;
 
 			this.searchTimer = new System.Diagnostics.Stopwatch();
-			this.millisecondsBetweenSearches = 5000;
-
-			// HACK: This might not be safe in all circumstances, but since AntennaRelays are not built until Start,
-			// we hope it is safe enough.
-			this.Kerbin = FlightGlobals.Bodies.FirstOrDefault(b => b.name == "Kerbin");
-		}
-
-		static AntennaRelay()
-		{
-			var config = KSP.IO.PluginConfiguration.CreateForType<AntennaRelay>();
-
-			config.load();
-
-			AntennaRelay.requireLineOfSight = config.GetValue<bool>("requireLineOfSight", false);
-
-			config.save();
+			this.millisecondsBetweenSearches = 125;
 		}
 	}
 }

--- /dev/null
+++ b/GameData/AntennaRange/ATM_AntennaRange.cfg
@@ -1,1 +1,15 @@
-
+ACTIVE_TEXTURE_MANAGER_CONFIG
+{
+	folder = AntennaRange
+	enabled  = true
+	OVERRIDES
+	{
+		AntennaRange/.*
+		{
+			compress = true
+			mipmaps = false
+			scale = 1
+			max_size = 0
+		}
+	}
+}

--- /dev/null
+++ b/GameData/AntennaRange/AntennaRange.cfg
@@ -1,1 +1,129 @@
+// AntennaRange
+//
+// AntennaRange.cfg
+//
+// Copyright © 2014, toadicus
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice,
+//    this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice,
+//    this list of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be used
+//    to endorse or promote products derived from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// This software uses the ModuleManager library © 2013 ialdabaoth, used under a Creative Commons Attribution-ShareAlike
+// 3.0 Uported License.
+//
+// Specifications:
+// nominalRange:	The distance from Kerbin at which the antenna will perform exactly as prescribed by
+//					packetResourceCost and packetSize.
+// maxPowerFactor:	The multiplier on packetResourceCost that defines the maximum power output of the antenna.  When the
+//					power cost exceeds packetResourceCost * maxPowerFactor, transmission will fail.
+// maxDataFactor:	The multipler on packetSize that defines the maximum data bandwidth of the antenna.
+// 
 
+@PART[longAntenna]:FOR[AntennaRange]:NEEDS[!RemoteTech2]
+{
+	@MODULE[ModuleDataTransmitter]
+	{
+		@name = ModuleLimitedDataTransmitter
+		nominalRange = 1500000
+		maxPowerFactor = 8
+		maxDataFactor = 4
+	}
+
+	MODULE
+	{
+		name = ModuleScienceContainer
+
+		dataIsCollectable = true
+		dataIsStorable = false
+
+		storageRange = 2
+	}
+}
+
+@PART[mediumDishAntenna]:FOR[AntennaRange]:NEEDS[!RemoteTech2]
+{
+	@MODULE[ModuleDataTransmitter]
+	{
+		@name = ModuleLimitedDataTransmitter
+		nominalRange = 30000000
+		maxPowerFactor = 8
+		maxDataFactor = 4
+	}
+
+	MODULE
+	{
+		name = ModuleScienceContainer
+
+		dataIsCollectable = true
+		dataIsStorable = false
+
+		storageRange = 2
+	}
+}
+
+@PART[commDish]:FOR[AntennaRange]:NEEDS[!RemoteTech2]
+{
+	@MODULE[ModuleDataTransmitter]
+	{
+		@name = ModuleLimitedDataTransmitter
+		nominalRange = 80000000000
+		maxPowerFactor = 8
+		maxDataFactor = 4
+	}
+
+	MODULE
+	{
+		name = ModuleScienceContainer
+
+		dataIsCollectable = true
+		dataIsStorable = false
+
+		storageRange = 2
+	}
+}
+
+EVA_MODULE
+{
+	name = ModuleLimitedDataTransmitter
+
+	nominalRange = 5000
+	maxPowerFactor = 1
+	maxDataFactor = 1
+
+	packetInterval = 0.2
+	packetSize = 1
+	packetResourceCost = 6.25
+
+	requiredResource = ElectricCharge
+}
+
+EVA_RESOURCE
+{
+	name = ElectricCharge
+	amount = 100
+	maxAmount = 100
+}
+
+@EVA_RESOURCE[ElectricCharge]:AFTER[AntennaRange]:NEEDS[TacLifeSupport]
+{
+	!name = DELETE
+}
+

 Binary files /dev/null and b/GameData/AntennaRange/Textures/appLauncherIcon.png differ
 Binary files /dev/null and b/GameData/AntennaRange/Textures/appLauncherIconNoConnection.png differ
 Binary files /dev/null and b/GameData/AntennaRange/Textures/appLauncherIconSubOptimal.png differ
 Binary files /dev/null and b/GameData/AntennaRange/Textures/toolbarIcon.png differ
 Binary files /dev/null and b/GameData/AntennaRange/Textures/toolbarIconNoConnection.png differ
 Binary files /dev/null and b/GameData/AntennaRange/Textures/toolbarIconSubOptimal.png differ
--- a/IAntennaRelay.cs
+++ b/IAntennaRelay.cs
@@ -42,17 +42,31 @@
 		/// <value>The parent Vessel.</value>
 		Vessel vessel { get; }
 
+		IAntennaRelay nearestRelay { get; }
+
+		IAntennaRelay bestOccludedRelay { get; }
+
+		IAntennaRelay targetRelay { get; }
+
 		/// <summary>
 		/// Gets the distance to the nearest relay or Kerbin, whichever is closer.
 		/// </summary>
 		/// <value>The distance to the nearest relay or Kerbin, whichever is closer.</value>
 		double transmitDistance { get; }
 
+		double nominalTransmitDistance { get; }
+
 		/// <summary>
 		/// The maximum distance at which this relay can operate.
 		/// </summary>
 		/// <value>The max transmit distance.</value>
 		float maxTransmitDistance { get; }
+
+		/// <summary>
+		/// The first CelestialBody blocking line of sight to a 
+		/// </summary>
+		/// <value>The first occluding body.</value>
+		CelestialBody firstOccludingBody { get; }
 
 		/// <summary>
 		/// Gets a value indicating whether this <see cref="AntennaRange.ProtoDataTransmitter"/> has been checked during
@@ -62,10 +76,20 @@
 		bool relayChecked { get; }
 
 		/// <summary>
+		/// Gets a value indicating whether this <see cref="AntennaRange.IAntennaRelay"/> Relay is communicating
+		/// directly with Kerbin.
+		/// </summary>
+		bool KerbinDirect { get; }
+
+		/// <summary>
 		/// Determines whether this instance can transmit.
 		/// </summary>
 		/// <returns><c>true</c> if this instance can transmit; otherwise, <c>false</c>.</returns>
 		bool CanTransmit();
+
+		string ToString();
+
+		string Title { get; }
 	}
 }
 

--- a/ModuleLimitedDataTransmitter.cs
+++ b/ModuleLimitedDataTransmitter.cs
@@ -74,8 +74,11 @@
 		[KSPField(isPersistant = false)]
 		public float nominalRange;
 
+		[KSPField(isPersistant = false, guiActive = true, guiName = "Status")]
+		public string UIrelayStatus;
+
 		[KSPField(isPersistant = false, guiActive = true, guiName = "Relay")]
-		public string UIrelayStatus;
+		public string UIrelayTarget;
 
 		[KSPField(isPersistant = false, guiActive = true, guiName = "Transmission Distance")]
 		public string UItransmitDistance;
@@ -118,7 +121,58 @@
 		{
 			get
 			{
-				return base.vessel;
+				if (base.vessel != null)
+				{
+					return base.vessel;
+				}
+				else if (this.part != null)
+				{
+					return this.part.vessel;
+				}
+
+				else
+				{
+					return null;
+				}
+			}
+		}
+
+		public IAntennaRelay nearestRelay
+		{
+			get
+			{
+				if (this.relay == null)
+				{
+					return null;
+				}
+
+				return this.relay.nearestRelay;
+			}
+		}
+
+		public IAntennaRelay bestOccludedRelay
+		{
+			get
+			{
+				if (this.relay == null)
+				{
+					return null;
+				}
+
+				return this.relay.bestOccludedRelay;
+			}
+		}
+
+		public IAntennaRelay targetRelay
+		{
+			get
+			{
+				if (this.relay == null)
+				{
+					return null;
+				}
+
+				return this.relay.targetRelay;
 			}
 		}
 
@@ -127,7 +181,20 @@
 		{
 			get
 			{
+				if (this.relay == null)
+				{
+					return double.PositiveInfinity;
+				}
+
 				return this.relay.transmitDistance;
+			}
+		}
+
+		public double nominalTransmitDistance
+		{
+			get
+			{
+				return this.nominalRange;
 			}
 		}
 
@@ -136,7 +203,16 @@
 		{
 			get
 			{
-				return Mathf.Sqrt (this.maxPowerFactor) * this.nominalRange;
+				// TODO: Cache this in a way that doesn't break everything.
+				return Mathf.Sqrt(this.maxPowerFactor) * this.nominalRange;
+			}
+		}
+
+		public CelestialBody firstOccludingBody
+		{
+			get
+			{
+				return this.relay.firstOccludingBody;
 			}
 		}
 
@@ -209,7 +285,39 @@
 		{
 			get
 			{
-				return this.relay.relayChecked;
+				if (this.relay != null)
+				{
+					return this.relay.relayChecked;
+				}
+
+				// If our relay is null, always return null so we're never checked.
+				return true;
+			}
+		}
+
+		public bool KerbinDirect
+		{
+			get
+			{
+				if (this.relay != null)
+				{
+					return this.relay.KerbinDirect;
+				}
+
+				return false;
+			}
+		}
+
+		public string Title
+		{
+			get
+			{
+				if (this.part != null && this.part.partInfo != null)
+				{
+					return this.part.partInfo.title;
+				}
+
+				return string.Empty;
 			}
 		}
 
@@ -223,32 +331,9 @@
 			this.packetThrottle = 100f;
 		}
 
-		// At least once, when the module starts with a state on the launch pad or later, go find Kerbin.
-		public override void OnStart (StartState state)
-		{
-			base.OnStart (state);
-
-			if (state >= StartState.PreLaunch)
-			{
-				this.relay = new AntennaRelay(this);
-				this.relay.maxTransmitDistance = this.maxTransmitDistance;
-
-				this.UImaxTransmitDistance = Tools.MuMech_ToSI(this.maxTransmitDistance) + "m";
-
-				GameEvents.onPartActionUICreate.Add(this.onPartActionUICreate);
-				GameEvents.onPartActionUIDismiss.Add(this.onPartActionUIDismiss);
-			}
-		}
-
-		// When the module loads, fetch the Squad KSPFields from the base.  This is necessary in part because
-		// overloading packetSize and packetResourceCostinto a property in ModuleLimitedDataTransmitter didn't
-		// work.
-		public override void OnLoad(ConfigNode node)
-		{
-			this.Fields.Load(node);
-			base.Fields.Load(node);
-
-			base.OnLoad (node);
+		public override void OnAwake()
+		{
+			base.OnAwake();
 
 			this._basepacketSize = base.packetSize;
 			this._basepacketResourceCost = base.packetResourceCost;
@@ -269,6 +354,35 @@
 			));
 		}
 
+		// At least once, when the module starts with a state on the launch pad or later, go find Kerbin.
+		public override void OnStart (StartState state)
+		{
+			base.OnStart (state);
+
+			if (state >= StartState.PreLaunch)
+			{
+				this.relay = new AntennaRelay(this);
+				this.relay.maxTransmitDistance = this.maxTransmitDistance;
+				this.relay.nominalTransmitDistance = this.nominalRange;
+
+				this.UImaxTransmitDistance = Tools.MuMech_ToSI(this.maxTransmitDistance) + "m";
+
+				GameEvents.onPartActionUICreate.Add(this.onPartActionUICreate);
+				GameEvents.onPartActionUIDismiss.Add(this.onPartActionUIDismiss);
+			}
+		}
+
+		// When the module loads, fetch the Squad KSPFields from the base.  This is necessary in part because
+		// overloading packetSize and packetResourceCostinto a property in ModuleLimitedDataTransmitter didn't
+		// work.
+		public override void OnLoad(ConfigNode node)
+		{
+			this.Fields.Load(node);
+			base.Fields.Load(node);
+
+			base.OnLoad (node);
+		}
+
 		// Post an error in the communication messages describing the reason transmission has failed.  Currently there
 		// is only one reason for this.
 		protected void PostCannotTransmitError()
@@ -294,14 +408,23 @@
 		// transmission fails (see CanTransmit).
 		protected void PreTransmit_SetPacketResourceCost()
 		{
-			if (this.transmitDistance <= this.nominalRange)
+			if (ARConfiguration.FixedPowerCost || this.transmitDistance <= this.nominalRange)
 			{
 				base.packetResourceCost = this._basepacketResourceCost;
 			}
 			else
 			{
+				double rangeFactor = (this.transmitDistance / this.nominalRange);
+				rangeFactor *= rangeFactor;
+
 				base.packetResourceCost = this._basepacketResourceCost
-					* (float)Math.Pow (this.transmitDistance / this.nominalRange, 2);
+					* (float)rangeFactor;
+
+				Tools.PostDebugMessage(
+					this,
+					"Pretransmit: packet cost set to {0} before throttle (rangeFactor = {1}).",
+					base.packetResourceCost,
+					rangeFactor);
 			}
 
 			base.packetResourceCost *= this.packetThrottle / 100f;
@@ -311,15 +434,24 @@
 		// distance.  packetSize maxes out at _basepacketSize * maxDataFactor.
 		protected void PreTransmit_SetPacketSize()
 		{
-			if (this.transmitDistance >= this.nominalRange)
+			if (!ARConfiguration.FixedPowerCost && this.transmitDistance >= this.nominalRange)
 			{
 				base.packetSize = this._basepacketSize;
 			}
 			else
 			{
+				double rangeFactor = (this.nominalRange / this.transmitDistance);
+				rangeFactor *= rangeFactor;
+
 				base.packetSize = Math.Min(
-					this._basepacketSize * (float)Math.Pow (this.nominalRange / this.transmitDistance, 2),
+					this._basepacketSize * (float)rangeFactor,
 					this._basepacketSize * this.maxDataFactor);
+
+				Tools.PostDebugMessage(
+					this,
+					"Pretransmit: packet size set to {0} before throttle (rangeFactor = {1}).",
+					base.packetSize,
+					rangeFactor);
 			}
 
 			base.packetSize *= this.packetThrottle / 100f;
@@ -337,6 +469,11 @@
 		// Override ModuleDataTransmitter.CanTransmit to return false when transmission is not possible.
 		public new bool CanTransmit()
 		{
+			if (this.part == null || this.relay == null)
+			{
+				return false;
+			}
+
 			PartStates partState = this.part.State;
 			if (partState == PartStates.DEAD || partState == PartStates.DEACTIVATED)
 			{
@@ -369,7 +506,9 @@
 
 				message.Append("Beginning transmission ");
 
-				if (this.relay.nearestRelay == null)
+				// @DONE TODO: Fix this to fall back to Kerbin if nearestRelay cannot be contacted.
+				// @DONE TODO: Remove nearestRelay == null
+				if (this.KerbinDirect)
 				{
 					message.Append("directly to Kerbin.");
 				}
@@ -385,6 +524,75 @@
 			}
 			else
 			{
+				Tools.PostDebugMessage(this, "{0} unable to transmit during TransmitData.", this.part.partInfo.title);
+
+				var logger = Tools.DebugLogger.New(this);
+
+				foreach (ModuleScienceContainer	scienceContainer in this.vessel.getModulesOfType<ModuleScienceContainer>())
+				{
+					logger.AppendFormat("Checking ModuleScienceContainer in {0}\n",
+						scienceContainer.part.partInfo.title);
+
+					if (
+						scienceContainer.capacity != 0 &&
+						scienceContainer.GetScienceCount() >= scienceContainer.capacity
+					)
+					{
+						logger.Append("\tInsufficient capacity, skipping.\n");
+						continue;
+					}
+
+					List<ScienceData> dataStored = new List<ScienceData>();
+
+					foreach (ScienceData data in dataQueue)
+					{
+						if (!scienceContainer.allowRepeatedSubjects && scienceContainer.HasData(data))
+						{
+							logger.Append("\tAlready contains subject and repeated subjects not allowed, skipping.\n");
+							continue;
+						}
+
+						logger.AppendFormat("\tAcceptable, adding data on subject {0}... ", data.subjectID);
+						if (scienceContainer.AddData(data))
+						{
+							logger.Append("done, removing from queue.\n");
+
+							dataStored.Add(data);
+						}
+						#if DEBUG
+						else
+						{
+							logger.Append("failed.\n");
+						}
+						#endif
+					}
+
+					dataQueue.RemoveAll(i => dataStored.Contains(i));
+
+					logger.AppendFormat("\t{0} data left in queue.", dataQueue.Count);
+				}
+
+				logger.Print();
+
+				if (dataQueue.Count > 0)
+				{
+					StringBuilder msg = new StringBuilder();
+
+					msg.Append('[');
+					msg.Append(this.part.partInfo.title);
+					msg.AppendFormat("]: {0} data items could not be saved: no space available in data containers.\n");
+					msg.Append("Data to be discarded:\n");
+
+					foreach (ScienceData data in dataQueue)
+					{
+						msg.AppendFormat("\n{0}\n", data.title);
+					}
+
+					ScreenMessages.PostScreenMessage(msg.ToString(), 4f, ScreenMessageStyle.UPPER_LEFT);
+
+					Tools.PostDebugMessage(msg.ToString());
+				}
+
 				this.PostCannotTransmitError ();
 			}
 
@@ -418,7 +626,9 @@
 
 				message.Append("Beginning transmission ");
 
-				if (this.relay.nearestRelay == null)
+				// @DONE TODO: Fix this to fall back to Kerbin if nearestRelay cannot be contacted.
+				// @DONE TODO: Remove nearestRelay == null
+				if (this.KerbinDirect)
 				{
 					message.Append("directly to Kerbin.");
 				}
@@ -444,7 +654,7 @@
 			{
 				if (this.CanTransmit())
 				{
-					this.UIrelayStatus = string.Intern("Connected");
+					this.UIrelayStatus = "Connected";
 					this.UItransmitDistance = Tools.MuMech_ToSI(this.transmitDistance) + "m";
 					this.UIpacketSize = Tools.MuMech_ToSI(this.DataRate) + "MiT";
 					this.UIpacketCost = Tools.MuMech_ToSI(this.DataResourceCost) + "E";
@@ -453,7 +663,7 @@
 				{
 					if (this.relay.firstOccludingBody == null)
 					{
-						this.UIrelayStatus = string.Intern("Out of range");
+						this.UIrelayStatus = "Out of range";
 					}
 					else
 					{
@@ -463,6 +673,15 @@
 					this.UIpacketSize = "N/A";
 					this.UIpacketCost = "N/A";
 				}
+
+				if (this.KerbinDirect)
+				{
+					this.UIrelayTarget = AntennaRelay.Kerbin.bodyName;
+				}
+				else
+				{
+					this.UIrelayTarget = this.targetRelay.ToString();
+				}
 			}
 		}
 
@@ -493,12 +712,22 @@
 				msg.Append(" on ");
 				msg.Append(vessel.vesselName);
 			}
+			else if (
+				this.part != null &&
+				this.part.protoPartSnapshot != null &&
+				this.part.protoPartSnapshot != null &&
+				this.part.protoPartSnapshot.pVesselRef != null
+			)
+			{
+				msg.Append(" on ");
+				msg.Append(this.part.protoPartSnapshot.pVesselRef.vesselName);
+			}
 
 			return msg.ToString();
 		}
 
 		// When debugging, it's nice to have a button that just tells you everything.
-		#if DEBUG
+
 		[KSPEvent (guiName = "Show Debug Info", active = true, guiActive = true)]
 		public void DebugInfo()
 		{
@@ -519,7 +748,9 @@
 				"DataResourceCost: {10}\n" +
 				"TransmitterScore: {11}\n" +
 				"NearestRelay: {12}\n" +
-				"Vessel ID: {13}",
+				"BestOccludedRelay: {13}\n" +
+				"KerbinDirect: {14}\n" +
+				"Vessel ID: {15}",
 				this.name,
 				this._basepacketSize,
 				base.packetSize,
@@ -532,10 +763,13 @@
 				this.DataRate,
 				this.DataResourceCost,
 				ScienceUtil.GetTransmitterScore(this),
-				this.relay.FindNearestRelay(),
+				this.relay.nearestRelay == null ? "null" : this.relay.nearestRelay.ToString(),
+				this.relay.bestOccludedRelay == null ? "null" : this.relay.bestOccludedRelay.ToString(),
+				this.KerbinDirect,
 				this.vessel.id
 				);
-			Tools.PostDebugMessage(msg);
+
+			Tools.PostLogMessage(msg);
 		}
 
 		[KSPEvent (guiName = "Dump Vessels", active = true, guiActive = true)]
@@ -553,11 +787,10 @@
 			Tools.PostDebugMessage(sb.ToString());
 		}
 
-		[KSPEvent (guiName = "Dump RelayDB", active = true, guiActive = true)]
+		/*[KSPEvent (guiName = "Dump RelayDB", active = true, guiActive = true)]
 		public void DumpRelayDB()
 		{
 			RelayDatabase.Instance.Dump();
-		}
-		#endif
+		}*/
 	}
 }

--- a/Properties/AssemblyInfo.cs
+++ b/Properties/AssemblyInfo.cs
@@ -29,6 +29,8 @@
 using System.Reflection;
 using System.Runtime.CompilerServices;
 
+[assembly: KSPAssemblyDependency("ToadicusTools", 0, 0)]
+
 // Information about this assembly is defined by the following attributes.
 // Change them to the values specific to your project.
 [assembly: AssemblyTitle("AntennaRange")]
@@ -37,10 +39,9 @@
 // The assembly version has the format "{Major}.{Minor}.{Build}.{Revision}".
 // The form "{Major}.{Minor}.*" will automatically update the build and revision,
 // and "{Major}.{Minor}.{Build}.*" will update just the revision.
-[assembly: AssemblyVersion("1.2.*")]
+[assembly: AssemblyVersion("1.8.*")]
 // The following attributes are used to specify the signing key for the assembly,
 // if desired. See the Mono documentation for more information about signing.
 //[assembly: AssemblyDelaySign(false)]
 //[assembly: AssemblyKeyFile("")]
 
-

--- a/ProtoAntennaRelay.cs
+++ b/ProtoAntennaRelay.cs
@@ -50,6 +50,14 @@
 			}
 		}
 
+		public override double nominalTransmitDistance
+		{
+			get
+			{
+				return this.moduleRef.nominalTransmitDistance;
+			}
+		}
+
 		/// <summary>
 		/// The maximum distance at which this transmitter can operate.
 		/// </summary>
@@ -77,11 +85,16 @@
 		/// Gets the underlying part's title.
 		/// </summary>
 		/// <value>The title.</value>
-		public string title
+		public string Title
 		{
 			get
 			{
-				return this.protoPart.partInfo.title;
+				if (this.protoPart != null && this.protoPart.partInfo != null)
+				{
+					return this.protoPart.partInfo.title;
+				}
+
+				return string.Empty;
 			}
 		}
 
@@ -93,7 +106,7 @@
 				Tools.PostDebugMessage(string.Format(
 					"{0}: {1} on {2} cannot transmit: {3}",
 					this.GetType().Name,
-					this.title,
+					this.Title,
 					this.vessel.vesselName,
 					Enum.GetName(typeof(PartStates), partState)
 				));
@@ -105,8 +118,8 @@
 		public override string ToString()
 		{
 			return string.Format(
-				"{0} on {1} (proto)",
-				this.title,
+				"{0} on {1}",
+				this.Title,
 				this.protoPart.pVesselRef.vesselName
 			);
 		}

--- a/RelayExtensions.cs
+++ b/RelayExtensions.cs
@@ -55,7 +55,7 @@
 		/// <param name="body">A <see cref="CelestialBody"/></param>
 		public static double DistanceTo(this AntennaRelay relay, CelestialBody body)
 		{
-			return relay.vessel.DistanceTo(body);
+			return relay.vessel.DistanceTo(body) - body.Radius;
 		}
 
 		/// <summary>
@@ -68,13 +68,28 @@
 			return relayOne.DistanceTo(relayTwo.vessel);
 		}
 
+		public static double sqrDistanceTo(this AntennaRelay relay, Vessel vessel)
+		{
+			return relay.vessel.sqrDistanceTo(vessel);
+		}
+
+		public static double sqrDistanceTo(this AntennaRelay relay, CelestialBody body)
+		{
+			return relay.vessel.sqrDistanceTo(body);
+		}
+
+		public static double sqrDistanceTo(this AntennaRelay relayOne, IAntennaRelay relayTwo)
+		{
+			return relayOne.vessel.sqrDistanceTo(relayTwo.vessel);
+		}
+
 		/// <summary>
 		/// Returns all of the PartModules or ProtoPartModuleSnapshots implementing IAntennaRelay in this Vessel.
 		/// </summary>
 		/// <param name="vessel">This <see cref="Vessel"/></param>
 		public static IEnumerable<IAntennaRelay> GetAntennaRelays (this Vessel vessel)
 		{
-			return RelayDatabase.Instance[vessel].Values.ToList();
+			return RelayDatabase.Instance[vessel].Values.ToList().AsReadOnly();
 		}
 
 		/// <summary>

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