Trying to be a little more consistent about float vs double.
Trying to be a little more consistent about float vs double.

--- a/ARConfiguration.cs
+++ b/ARConfiguration.cs
@@ -37,6 +37,12 @@
 			private set;
 		}
 
+		public static bool PrettyLines
+		{
+			get;
+			private set;
+		}
+
 		private bool showConfigWindow;
 		private Rect configWindowPos;
 
@@ -80,6 +86,8 @@
 				this.LoadConfigValue("requireConnectionForControl", false);
 
 			ARConfiguration.FixedPowerCost = this.LoadConfigValue("fixedPowerCost", false);
+
+			ARConfiguration.PrettyLines = this.LoadConfigValue("drawPrettyLines", true);
 
 			GameEvents.onGameSceneLoadRequested.Add(this.onSceneChangeRequested);
 
@@ -184,6 +192,17 @@
 
 			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();

--- a/ARFlightController.cs
+++ b/ARFlightController.cs
@@ -41,9 +41,14 @@
 		protected Dictionary<ConnectionStatus, string> connectionTextures;
 		protected Dictionary<ConnectionStatus, Texture> appLauncherTextures;
 
+		protected ARMapRenderer mapRenderer;
+
 		protected IButton toolbarButton;
 
 		protected ApplicationLauncherButton appLauncherButton;
+		protected Tools.DebugLogger log;
+
+		protected System.Diagnostics.Stopwatch updateTimer;
 		#endregion
 
 		#region Properties
@@ -114,6 +119,10 @@
 		protected void Awake()
 		{
 			this.lockID = "ARConnectionRequired";
+
+			this.log = Tools.DebugLogger.New(this);
+
+			this.updateTimer = new System.Diagnostics.Stopwatch();
 
 			this.connectionTextures = new Dictionary<ConnectionStatus, string>();
 
@@ -144,6 +153,11 @@
 			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)
@@ -154,7 +168,7 @@
 				);
 			}
 
-			Tools.DebugLogger log = Tools.DebugLogger.New(this);
+			this.log.Clear();
 
 			VesselCommand availableCommand;
 
@@ -203,6 +217,22 @@
 				InputLockManager.RemoveControlLock(this.lockID);
 			}
 
+			log.Print();
+		}
+
+		protected void Update()
+		{
+			if (!this.updateTimer.IsRunning || this.updateTimer.ElapsedMilliseconds > 125L)
+			{
+				this.updateTimer.Reset();
+			}
+			else
+			{
+				return;
+			}
+
+			this.log.Clear();
+
 			if (
 				(this.toolbarButton != null || this.appLauncherButton != null) &&
 				HighLogic.LoadedSceneIsFlight &&
@@ -211,62 +241,7 @@
 			{
 				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;
-				}
+				this.currentConnectionStatus = FlightGlobals.ActiveVessel.GetConnectionStatus();
 
 				log.AppendFormat("currentConnectionStatus: {0}, setting texture to {1}",
 					this.currentConnectionStatus, this.currentConnectionTexture);
@@ -297,6 +272,11 @@
 		{
 			InputLockManager.RemoveControlLock(this.lockID);
 
+			if (this.mapRenderer != null)
+			{
+				GameObject.Destroy(this.mapRenderer);
+			}
+
 			if (this.toolbarButton != null)
 			{
 				this.toolbarButton.Destroy();
@@ -327,13 +307,6 @@
 			InputLockManager.RemoveControlLock(this.lockID);
 		}
 		#endregion
-
-		public enum ConnectionStatus
-		{
-			None,
-			Suboptimal,
-			Optimal
-		}
 	}
 }
 

file:b/ARMapRenderer.cs (new)
--- /dev/null
+++ b/ARMapRenderer.cs
@@ -1,1 +1,244 @@
-
+// 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;
+		#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 = MapView.OrbitLinesMaterial;
+					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>();
+			}
+		}
+
+		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
+				);
+
+				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;
+						}
+
+						IAntennaRelay vesselRelay = vessel.GetBestRelay();
+
+						if (vesselRelay != null)
+						{
+							this.SetRelayVertices(vesselRelay);
+						}
+					}
+				}
+			}
+			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 = 0.005859375f * MapView.MapCamera.Distance;
+			}
+			else
+			{
+				lineWidth = 2f;
+
+				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();
+			}
+		}
+	}
+}
+
+

--- a/AntennaRange.csproj
+++ b/AntennaRange.csproj
@@ -78,6 +78,7 @@
     <Compile Include="RelayExtensions.cs" />
     <Compile Include="ARConfiguration.cs" />
     <Compile Include="ARFlightController.cs" />
+    <Compile Include="ARMapRenderer.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>

--- a/AntennaRelay.cs
+++ b/AntennaRelay.cs
@@ -31,17 +31,13 @@
 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
 	{
 		// We don't have a Bard, so we'll hide Kerbin here.
 		private static CelestialBody _Kerbin;
-		protected static CelestialBody Kerbin
+		public static CelestialBody Kerbin
 		{
 			get
 			{
@@ -54,8 +50,12 @@
 			}
 		}
 
-		private IAntennaRelay _nearestRelayCache;
+		protected bool canTransmit;
+
 		protected IAntennaRelay moduleRef;
+
+		private IAntennaRelay nearestRelay;
+		private IAntennaRelay bestOccludedRelay;
 
 		protected System.Diagnostics.Stopwatch searchTimer;
 		protected long millisecondsBetweenSearches;
@@ -72,31 +72,7 @@
 			}
 		}
 
-		/// <summary>
-		/// Gets or sets the nearest relay.
-		/// </summary>
-		/// <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;
-			}
-		}
-
-		public IAntennaRelay bestOccludedRelay
+		public IAntennaRelay targetRelay
 		{
 			get;
 			protected set;
@@ -119,146 +95,104 @@
 		{
 			get
 			{
-				// If there is no available relay nearby...
-				// @DONE TODO: Remove nearestRelay == null
-				double kerbinDistance = this.DistanceTo(Kerbin);
-
-				if (this.nearestRelay != null)
-				{
-					double relayDistance = this.DistanceTo(this.nearestRelay);
-
-					// If our nearest relay is nearer than Kerbin, use its distance.
-					if (relayDistance < kerbinDistance)
-					{
-						this.KerbinDirect = false;
-
-						return relayDistance;
-					}
-				}
-
-				this.KerbinDirect = true;
-				
-
-				// .. return the distance to Kerbin
-				return kerbinDistance;
-			}
-		}
-
-		/// <summary>
-		/// The maximum distance at which this relay can operate.
-		/// </summary>
-		/// <value>The max transmit distance.</value>
-		public virtual float maxTransmitDistance
+				this.FindNearestRelay();
+
+				if (this.KerbinDirect || this.targetRelay == null)
+				{
+					return this.DistanceTo(Kerbin);
+				}
+				else
+				{
+					return this.DistanceTo(this.targetRelay);
+				}
+			}
+		}
+
+		public virtual double nominalTransmitDistance
 		{
 			get;
 			set;
 		}
 
 		/// <summary>
-		/// Gets a value indicating whether this <see cref="AntennaRange.ProtoDataTransmitter"/> has been checked during
-		/// the current relay attempt.
-		/// </summary>
-		/// <value><c>true</c> if relay checked; otherwise, <c>false</c>.</value>
-		public virtual bool relayChecked
+		/// The maximum distance at which this relay can operate.
+		/// </summary>
+		/// <value>The max transmit distance.</value>
+		public virtual double maxTransmitDistance
+		{
+			get;
+			set;
+		}
+
+		public virtual bool KerbinDirect
 		{
 			get;
 			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()
 		{
-			CelestialBody fob = null;
-
-			// @DONE TODO: Remove nearestRelay == null
-			// Because we're correctly falling back to Kerbin in transmitDistance the first test should always fail
-			// when we're out of range of anything, and the second will fail when LOS is blocked (and enforced).
-
-			// If our transmit distance is greater than our maximum range, we can't transmit and it doesn't matter why.
-			if (this.transmitDistance > this.maxTransmitDistance)
-			{
-				this.firstOccludingBody = null;
-				return false;
-			}
-			// ...if we're in range...
+			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
 			{
-				// ...check for LOS problems...
-				if (
-					ARConfiguration.RequireLineOfSight
-					&& this.KerbinDirect &&
-					!this.vessel.hasLineOfSightTo(Kerbin, out fob, ARConfiguration.RadiusRatio)
-				)
-				{
-					this.firstOccludingBody = fob;
-					return false;
-				}
-
-				this.firstOccludingBody = null;
-				return true;
-			}
-		}
-
-		/// <summary>
-		/// Finds the nearest relay.
-		/// </summary>
-		/// <returns>The nearest relay or null, if no relays in range.</returns>
-		private 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
-			));
-
+				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.PostDebugMessage(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;
+
+			// Blank everything we're trying to find before the search.
 			this.firstOccludingBody = null;
 			this.bestOccludedRelay = null;
-
-			// Set this vessel as checked, so that we don't check it again.
-			RelayDatabase.Instance.CheckedVesselsTable[vessel.id] = true;
-
-			double nearestSqrDistance = double.PositiveInfinity;
+			this.targetRelay = null;
+			this.nearestRelay = null;
+
+			CelestialBody bodyOccludingBestOccludedRelay = null;
+
+			double nearestRelaySqrDistance = double.PositiveInfinity;
 			double bestOccludedSqrDistance = double.PositiveInfinity;
-
-			IAntennaRelay _nearestRelay = null;
+			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)
 				{
@@ -281,32 +215,68 @@
 				// 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.
-				CelestialBody fob = null;
-
 				if (
 					ARConfiguration.RequireLineOfSight &&
 					!this.vessel.hasLineOfSightTo(potentialVessel, out fob, ARConfiguration.RadiusRatio)
 				)
 				{
-					Tools.PostDebugMessage(
-						this,
-						"Vessel {0} discarded because we do not have line of sight.",
-						potentialVessel.vesselName
-					);
+					this.firstOccludingBody = fob;
+
+					if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
+					{
+						Tools.PostDebugMessage("{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 < this.maxTransmitDistance
+						(potentialSqrDistance < bestOccludedSqrDistance) &&
+						(potentialSqrDistance < maxTransmitSqrDistance)
 					)
 					{
+						if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
+						{
+							Tools.PostDebugMessage("{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.PostDebugMessage(this.ToString() +  " Checking candidate for bestOccludedRelay: {0}" +
+									"\n\tCanTransmit: {1}", occludedRelay, occludedRelay.CanTransmit());
+							}
+
 							if (occludedRelay.CanTransmit())
 							{
 								this.bestOccludedRelay = occludedRelay;
-								this.firstOccludingBody = fob;
+								bodyOccludingBestOccludedRelay = fob;
 								bestOccludedSqrDistance = potentialSqrDistance;
+
+								if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
+								{
+									Tools.PostDebugMessage(this.ToString() + " Found new bestOccludedRelay: {0}" +
+										"\nfirstOccludingBody: {1}" +
+										"\nbestOccludedSqrDistance: {2}",
+										occludedRelay,
+										fob,
+										potentialSqrDistance
+									);
+								}
 								break;
 							}
 						}
@@ -318,39 +288,201 @@
 				/*
 				 * ...so that we can skip the vessel if it is further away than a vessel we've already checked.
 				 * */
-				if (potentialSqrDistance > nearestSqrDistance)
-				{
-					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.PostDebugMessage("{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.PostDebugMessage(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;
+
+			Tools.DebugLogger log = Tools.DebugLogger.New(this);
+
+			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());
+
+			log.Print();
 
 			// 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>
@@ -362,7 +494,7 @@
 			this.moduleRef = module;
 
 			this.searchTimer = new System.Diagnostics.Stopwatch();
-			this.millisecondsBetweenSearches = 5000;
+			this.millisecondsBetweenSearches = 125L;
 		}
 	}
 }

--- a/IAntennaRelay.cs
+++ b/IAntennaRelay.cs
@@ -31,41 +31,40 @@
 
 namespace AntennaRange
 {
-	/*
-	 * Interface defining the basic functionality of AntennaRelay modules for AntennaRange.
-	 * */
+	/// <summary>
+	/// Interface defining the basic functionality of AntennaRelay modules for AntennaRange.
+	/// </summary>
 	public interface IAntennaRelay
 	{
 		/// <summary>
 		/// Gets the parent Vessel.
 		/// </summary>
-		/// <value>The parent Vessel.</value>
 		Vessel vessel { get; }
+
+		/// <summary>
+		/// Gets the target <see cref="AntennaRange.IAntennaRelay"/>relay.
+		/// </summary>
+		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; }
+
+		/// <summary>
+		/// Gets the nominal transmit distance at which the Antenna behaves just as prescribed by Squad's config.
+		/// </summary>
+		double nominalTransmitDistance { get; }
 
 		/// <summary>
 		/// The maximum distance at which this relay can operate.
 		/// </summary>
-		/// <value>The max transmit distance.</value>
-		float maxTransmitDistance { get; }
+		double 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
-		/// the current relay attempt.
-		/// </summary>
-		/// <value><c>true</c> if relay checked; otherwise, <c>false</c>.</value>
-		bool relayChecked { get; }
 
 		/// <summary>
 		/// Gets a value indicating whether this <see cref="AntennaRange.IAntennaRelay"/> Relay is communicating
@@ -74,10 +73,20 @@
 		bool KerbinDirect { get; }
 
 		/// <summary>
+		/// Gets the Part title.
+		/// </summary>
+		string Title { get; }
+
+		/// <summary>
 		/// Determines whether this instance can transmit.
+		/// <c>true</c> if this instance can transmit; otherwise, <c>false</c>.
 		/// </summary>
-		/// <returns><c>true</c> if this instance can transmit; otherwise, <c>false</c>.</returns>
 		bool CanTransmit();
+
+		/// <summary>
+		/// Returns a <see cref="System.String"/> that represents the current <see cref="AntennaRange.IAntennaRelay"/>.
+		/// </summary>
+		string ToString();
 	}
 }
 

--- a/ModuleLimitedDataTransmitter.cs
+++ b/ModuleLimitedDataTransmitter.cs
@@ -72,7 +72,7 @@
 		// The distance from Kerbin at which the antenna will perform exactly as prescribed by packetResourceCost
 		// and packetSize.
 		[KSPField(isPersistant = false)]
-		public float nominalRange;
+		public double nominalRange;
 
 		[KSPField(isPersistant = false, guiActive = true, guiName = "Status")]
 		public string UIrelayStatus;
@@ -121,25 +121,64 @@
 		{
 			get
 			{
-				return base.vessel;
-			}
-		}
-
-		// Returns the distance to the nearest relay or Kerbin, whichever is closer.
+				if (base.vessel != null)
+				{
+					return base.vessel;
+				}
+				else if (this.part != null)
+				{
+					return this.part.vessel;
+				}
+
+				else
+				{
+					return null;
+				}
+			}
+		}
+
+		public IAntennaRelay targetRelay
+		{
+			get
+			{
+				if (this.relay == null)
+				{
+					return null;
+				}
+
+				return this.relay.targetRelay;
+			}
+		}
+
+		// Returns the distance to the target relay or Kerbin, whichever is closer.
 		public double transmitDistance
 		{
 			get
 			{
+				if (this.relay == null)
+				{
+					return double.PositiveInfinity;
+				}
+
 				return this.relay.transmitDistance;
 			}
 		}
 
+		public double nominalTransmitDistance
+		{
+			get
+			{
+				return this.nominalRange;
+			}
+		}
+
 		// Returns the maximum distance this module can transmit
-		public float maxTransmitDistance
-		{
-			get
-			{
-				return Mathf.Sqrt (this.maxPowerFactor) * this.nominalRange;
+		public double maxTransmitDistance
+		{
+			get
+			{
+				// TODO: Cache this in a way that doesn't break everything.
+				return Math.Sqrt(this.maxPowerFactor) * this.nominalRange;
 			}
 		}
 
@@ -215,31 +254,29 @@
 			}
 		}
 
-		// Reports whether this antenna has been checked as a viable relay already in the current FindNearestRelay.
-		public bool relayChecked
+		public bool KerbinDirect
 		{
 			get
 			{
 				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;
 			}
 		}
 
@@ -285,6 +322,7 @@
 			{
 				this.relay = new AntennaRelay(this);
 				this.relay.maxTransmitDistance = this.maxTransmitDistance;
+				this.relay.nominalTransmitDistance = this.nominalRange;
 
 				this.UImaxTransmitDistance = Tools.MuMech_ToSI(this.maxTransmitDistance) + "m";
 
@@ -335,11 +373,11 @@
 			}
 			else
 			{
-				double rangeFactor = (this.transmitDistance / this.nominalRange);
+				float rangeFactor = (float)(this.transmitDistance / this.nominalRange);
 				rangeFactor *= rangeFactor;
 
 				base.packetResourceCost = this._basepacketResourceCost
-					* (float)rangeFactor;
+					* rangeFactor;
 
 				Tools.PostDebugMessage(
 					this,
@@ -361,11 +399,11 @@
 			}
 			else
 			{
-				double rangeFactor = (this.nominalRange / this.transmitDistance);
+				float rangeFactor = (float)(this.nominalRange / this.transmitDistance);
 				rangeFactor *= rangeFactor;
 
-				base.packetSize = Math.Min(
-					this._basepacketSize * (float)rangeFactor,
+				base.packetSize = Mathf.Min(
+					this._basepacketSize * rangeFactor,
 					this._basepacketSize * this.maxDataFactor);
 
 				Tools.PostDebugMessage(
@@ -419,27 +457,7 @@
 
 			if (this.CanTransmit())
 			{
-				StringBuilder message = new StringBuilder();
-
-				message.Append("[");
-				message.Append(base.part.partInfo.title);
-				message.Append("]: ");
-
-				message.Append("Beginning transmission ");
-
-				// @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.");
-				}
-				else
-				{
-					message.Append("via ");
-					message.Append(this.relay.nearestRelay);
-				}
-
-				ScreenMessages.PostScreenMessage(message.ToString(), 4f, ScreenMessageStyle.UPPER_LEFT);
+				ScreenMessages.PostScreenMessage(this.buildTransmitMessage(), 4f, ScreenMessageStyle.UPPER_LEFT);
 
 				base.TransmitData(dataQueue);
 			}
@@ -539,27 +557,7 @@
 
 			if (this.CanTransmit())
 			{
-				StringBuilder message = new StringBuilder();
-
-				message.Append("[");
-				message.Append(base.part.partInfo.title);
-				message.Append("]: ");
-
-				message.Append("Beginning transmission ");
-
-				// @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.");
-				}
-				else
-				{
-					message.Append("via ");
-					message.Append(this.relay.nearestRelay);
-				}
-
-				ScreenMessages.PostScreenMessage(message.ToString(), 4f, ScreenMessageStyle.UPPER_LEFT);
+				ScreenMessages.PostScreenMessage(this.buildTransmitMessage(), 4f, ScreenMessageStyle.UPPER_LEFT);
 
 				base.StartTransmission();
 			}
@@ -597,18 +595,11 @@
 
 				if (this.KerbinDirect)
 				{
-					if (this.relay.bestOccludedRelay != null)
-					{
-						this.UIrelayTarget = this.relay.bestOccludedRelay.ToString();
-					}
-					else
-					{
-						this.UIrelayTarget = "Kerbin";
-					}
+					this.UIrelayTarget = AntennaRelay.Kerbin.bodyName;
 				}
 				else
 				{
-					this.UIrelayTarget = this.relay.nearestRelay.ToString();
+					this.UIrelayTarget = this.targetRelay.ToString();
 				}
 			}
 		}
@@ -640,12 +631,45 @@
 				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();
 		}
 
+		private string buildTransmitMessage()
+		{
+			StringBuilder message = new StringBuilder();
+
+			message.Append("[");
+			message.Append(base.part.partInfo.title);
+			message.Append("]: ");
+
+			message.Append("Beginning transmission ");
+
+			if (this.KerbinDirect)
+			{
+				message.Append("directly to Kerbin.");
+			}
+			else
+			{
+				message.Append("via ");
+				message.Append(this.relay.targetRelay);
+			}
+
+			return message.ToString();
+		}
+
+		#if DEBUG
 		// 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()
 		{
@@ -665,8 +689,9 @@
 				"DataRate: {9}\n" +
 				"DataResourceCost: {10}\n" +
 				"TransmitterScore: {11}\n" +
-				"NearestRelay: {12}\n" +
-				"Vessel ID: {13}",
+				"targetRelay: {12}\n" +
+				"KerbinDirect: {13}\n" +
+				"Vessel ID: {14}",
 				this.name,
 				this._basepacketSize,
 				base.packetSize,
@@ -679,10 +704,12 @@
 				this.DataRate,
 				this.DataResourceCost,
 				ScienceUtil.GetTransmitterScore(this),
-				this.relay.FindNearestRelay(),
+				this.relay.targetRelay == null ? "null" : this.relay.targetRelay.ToString(),
+				this.KerbinDirect,
 				this.vessel.id
 				);
-			Tools.PostDebugMessage(msg);
+
+			Tools.PostLogMessage(msg);
 		}
 
 		[KSPEvent (guiName = "Dump Vessels", active = true, guiActive = true)]
@@ -699,7 +726,7 @@
 
 			Tools.PostDebugMessage(sb.ToString());
 		}
-
+		 
 		[KSPEvent (guiName = "Dump RelayDB", active = true, guiActive = true)]
 		public void DumpRelayDB()
 		{

--- a/ProtoAntennaRelay.cs
+++ b/ProtoAntennaRelay.cs
@@ -50,11 +50,19 @@
 			}
 		}
 
+		public override double nominalTransmitDistance
+		{
+			get
+			{
+				return this.moduleRef.nominalTransmitDistance;
+			}
+		}
+
 		/// <summary>
 		/// The maximum distance at which this transmitter can operate.
 		/// </summary>
 		/// <value>The max transmit distance.</value>
-		public override float maxTransmitDistance
+		public override double maxTransmitDistance
 		{
 			get
 			{
@@ -63,25 +71,19 @@
 		}
 
 		/// <summary>
-		/// Gets a value indicating whether this <see cref="AntennaRange.ProtoDataTransmitter"/> has been checked during
-		/// the current relay attempt.
-		/// </summary>
-		/// <value><c>true</c> if relay checked; otherwise, <c>false</c>.</value>
-		public override bool relayChecked
-		{
-			get;
-			protected set;
-		}
-
-		/// <summary>
 		/// 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 +95,7 @@
 				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)
 				));
@@ -106,7 +108,7 @@
 		{
 			return string.Format(
 				"{0} on {1}",
-				this.title,
+				this.Title,
 				this.protoPart.pVesselRef.vesselName
 			);
 		}

--- a/RelayExtensions.cs
+++ b/RelayExtensions.cs
@@ -78,7 +78,7 @@
 			return relay.vessel.sqrDistanceTo(body);
 		}
 
-		public static double sqrDistanceTo(this AntennaRelay relayOne, AntennaRelay relayTwo)
+		public static double sqrDistanceTo(this AntennaRelay relayOne, IAntennaRelay relayTwo)
 		{
 			return relayOne.vessel.sqrDistanceTo(relayTwo.vessel);
 		}
@@ -89,7 +89,7 @@
 		/// <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>
@@ -109,6 +109,59 @@
 
 			return false;
 		}
+
+		public static ConnectionStatus GetConnectionStatus(this Vessel vessel)
+		{
+			bool canTransmit = false;
+
+			foreach (IAntennaRelay relay in RelayDatabase.Instance[vessel].Values)
+			{
+				if (relay.CanTransmit())
+				{
+					canTransmit = true;
+					if (relay.transmitDistance <= relay.nominalTransmitDistance)
+					{
+						return ConnectionStatus.Optimal;
+					}
+				}
+			}
+
+			if (canTransmit)
+			{
+				return ConnectionStatus.Suboptimal;
+			}
+			else
+			{
+				return ConnectionStatus.None;
+			}
+		}
+
+		public static IAntennaRelay GetBestRelay(this Vessel vessel)
+		{
+			IAntennaRelay bestRelay = null;
+			double bestScore = double.PositiveInfinity;
+			double relayScore = double.NaN;
+
+			foreach (IAntennaRelay relay in vessel.GetAntennaRelays())
+			{
+				relayScore = relay.transmitDistance / relay.maxTransmitDistance;
+
+				if (relayScore < bestScore)
+				{
+					bestScore = relayScore;
+					bestRelay = relay;
+				}
+			}
+
+			return bestRelay;
+		}
+	}
+
+	public enum ConnectionStatus
+	{
+		None,
+		Suboptimal,
+		Optimal
 	}
 }