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
@@ -46,6 +46,9 @@
 		protected IButton toolbarButton;
 
 		protected ApplicationLauncherButton appLauncherButton;
+		protected Tools.DebugLogger log;
+
+		protected System.Diagnostics.Stopwatch updateTimer;
 		#endregion
 
 		#region Properties
@@ -116,6 +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>();
 
@@ -161,7 +168,7 @@
 				);
 			}
 
-			Tools.DebugLogger log = Tools.DebugLogger.New(this);
+			this.log.Clear();
 
 			VesselCommand availableCommand;
 
@@ -209,7 +216,23 @@
 				// ...unlock the controls.
 				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 &&
@@ -218,62 +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);
@@ -339,13 +307,6 @@
 			InputLockManager.RemoveControlLock(this.lockID);
 		}
 		#endregion
-
-		public enum ConnectionStatus
-		{
-			None,
-			Suboptimal,
-			Optimal
-		}
 	}
 }
 

--- a/ARMapRenderer.cs
+++ b/ARMapRenderer.cs
@@ -38,7 +38,6 @@
 	{
 		#region Fields
 		private Dictionary<Guid, LineRenderer> vesselLineRenderers;
-		private Dictionary<Guid, bool> vesselFrameCache;
 		#endregion
 
 		#region Properties
@@ -59,7 +58,7 @@
 					LineRenderer lr = obj.AddComponent<LineRenderer>();
 
 					lr.SetColors(Color.green, Color.green);
-					lr.material = new Material(Shader.Find("Particles/Additive"));
+					lr.material = MapView.OrbitLinesMaterial;
 					lr.SetVertexCount(2);
 
 					this.vesselLineRenderers[idx] = lr;
@@ -73,13 +72,15 @@
 		#region MonoBehaviour Lifecycle
 		private void Awake()
 		{
-			this.vesselLineRenderers = new Dictionary<Guid, LineRenderer>();
-			this.vesselFrameCache = new Dictionary<Guid, bool>();
+			if (ARConfiguration.PrettyLines)
+			{
+				this.vesselLineRenderers = new Dictionary<Guid, LineRenderer>();
+			}
 		}
 
 		private void OnPreCull()
 		{
-			if (!HighLogic.LoadedSceneIsFlight || !MapView.MapIsEnabled)
+			if (!HighLogic.LoadedSceneIsFlight || !MapView.MapIsEnabled || !ARConfiguration.PrettyLines)
 			{
 				this.Cleanup();
 
@@ -99,8 +100,6 @@
 					MapView.MapCamera.camera.fieldOfView,
 					MapView.MapCamera.Distance
 				);
-
-				this.vesselFrameCache.Clear();
 
 				log.AppendLine("vesselFrameCache cleared.");
 
@@ -129,48 +128,25 @@
 								continue;
 						}
 
-						log.Append("\tChecking connection status...\n");
-
-						/*if (vessel.HasConnectedRelay())
+						IAntennaRelay vesselRelay = vessel.GetBestRelay();
+
+						if (vesselRelay != null)
 						{
-							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;
-						}*/
+							this.SetRelayVertices(vesselRelay);
+						}
 					}
 				}
 			}
+			catch (Exception)
+			{
+				this.Cleanup();
+			}
+			#if DEBUG
 			finally
 			{
 				log.Print();
 			}
+			#endif
 		}
 
 		private void OnDestroy()
@@ -183,75 +159,71 @@
 
 		private void SetRelayVertices(IAntennaRelay relay)
 		{
-			do
-			{
-				if (this.vesselFrameCache.ContainsKey(relay.vessel.id))
-				{
-					break;
-				}
-
-				LineRenderer renderer = this[relay.vessel.id];
-
-				Vector3d start;
-				Vector3d end;
-
-				renderer.enabled = true;
-
-				if (!relay.CanTransmit())
-				{
-					renderer.SetColors(Color.red, Color.red);
+			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
 				{
-					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
-				{
-					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);
-
-				this.vesselFrameCache[relay.vessel.id] = true;
-
-				relay = relay.nearestRelay;
-			}
-			while (relay != null);
+					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()
@@ -265,11 +237,6 @@
 				}
 				this.vesselLineRenderers.Clear();
 			}
-
-			if (this.vesselFrameCache != null && this.vesselFrameCache.Count > 0)
-			{
-				this.vesselFrameCache.Clear();
-			}
 		}
 	}
 }

--- a/AntennaRelay.cs
+++ b/AntennaRelay.cs
@@ -31,10 +31,6 @@
 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
@@ -58,6 +54,9 @@
 
 		protected IAntennaRelay moduleRef;
 
+		private IAntennaRelay nearestRelay;
+		private IAntennaRelay bestOccludedRelay;
+
 		protected System.Diagnostics.Stopwatch searchTimer;
 		protected long millisecondsBetweenSearches;
 
@@ -73,92 +72,65 @@
 			}
 		}
 
-		/// <summary>
-		/// Gets or sets the nearest relay.
-		/// </summary>
-		/// <value>The nearest relay</value>
-		public IAntennaRelay nearestRelay
+		public IAntennaRelay targetRelay
 		{
 			get;
 			protected set;
 		}
 
-		public IAntennaRelay bestOccludedRelay
+		/// <summary>
+		/// Gets the first <see cref="CelestialBody"/> found to be blocking line of sight.
+		/// </summary>
+		public virtual CelestialBody firstOccludingBody
 		{
 			get;
 			protected set;
 		}
 
-		public IAntennaRelay targetRelay
+		/// <summary>
+		/// Gets the transmit distance.
+		/// </summary>
+		/// <value>The transmit distance.</value>
+		public double transmitDistance
+		{
+			get
+			{
+				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>
+		/// 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;
 		}
 
 		/// <summary>
-		/// Gets the first <see cref="CelestialBody"/> found to be blocking line of sight.
-		/// </summary>
-		public virtual CelestialBody firstOccludingBody
-		{
-			get;
-			protected set;
-		}
-
-		/// <summary>
-		/// Gets the transmit distance.
-		/// </summary>
-		/// <value>The transmit distance.</value>
-		public double transmitDistance
-		{
-			get
-			{
-				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>
-		/// The maximum distance at which this relay can operate.
-		/// </summary>
-		/// <value>The max transmit distance.</value>
-		public virtual float maxTransmitDistance
-		{
-			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
-		{
-			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>
@@ -183,12 +155,18 @@
 				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(
+				Tools.PostDebugMessage(string.Format(
 					"{0}: finding nearest relay for {1}",
 					this.GetType().Name,
-					this.moduleRef.ToString()
+					this.ToString()
 				));
 			}
 
@@ -215,12 +193,6 @@
 			 * */
 			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)
 				{
@@ -255,16 +227,15 @@
 
 					if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
 					{
-						Tools.PostLogMessage(
-							this.moduleRef.ToString() + 
-							"Vessel {0} discarded because we do not have line of sight." +
+						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)
+							potentialSqrDistance < (this.maxTransmitDistance * this.maxTransmitDistance),
+							this.ToString()
 						);
 					}
 
@@ -275,9 +246,8 @@
 					{
 						if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
 						{
-							Tools.PostLogMessage(
-								this.moduleRef.ToString() +
-								"Checking {0} relays on {1}.",
+							Tools.PostDebugMessage("{0}: Checking {1} relays on {2}.",
+								this.ToString(),
 								potentialVessel.GetAntennaRelays().Count(),
 								potentialVessel
 							);
@@ -287,7 +257,7 @@
 						{
 							if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
 							{
-								Tools.PostLogMessage(this.moduleRef.ToString() +  " Checking candidate for bestOccludedRelay: {0}" +
+								Tools.PostDebugMessage(this.ToString() +  " Checking candidate for bestOccludedRelay: {0}" +
 									"\n\tCanTransmit: {1}", occludedRelay, occludedRelay.CanTransmit());
 							}
 
@@ -299,7 +269,7 @@
 
 								if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
 								{
-									Tools.PostLogMessage(this.moduleRef.ToString() + " Found new bestOccludedRelay: {0}" +
+									Tools.PostDebugMessage(this.ToString() + " Found new bestOccludedRelay: {0}" +
 										"\nfirstOccludingBody: {1}" +
 										"\nbestOccludedSqrDistance: {2}",
 										occludedRelay,
@@ -322,9 +292,8 @@
 				{
 					if (FlightGlobals.ActiveVessel != null && FlightGlobals.ActiveVessel.id == this.vessel.id)
 					{
-						Tools.PostLogMessage(
-							this.moduleRef.ToString() +
-							" Vessel {0} discarded because it is out of range, or farther than another relay.",
+						Tools.PostDebugMessage("{0}: Vessel {1} discarded because it is out of range, or farther than another relay.",
+							this.ToString(),
 							potentialVessel.vesselName
 						);
 					}
@@ -335,14 +304,14 @@
 
 				foreach (IAntennaRelay potentialRelay in potentialVessel.GetAntennaRelays())
 				{
-					if (potentialRelay.CanTransmit())
+					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.moduleRef.ToString(),
+							Tools.PostDebugMessage(string.Format("{0}: found new best relay {1} ({2})",
+								this.ToString(),
 								this.nearestRelay.ToString(),
 								this.nearestRelay.vessel.id
 							));
@@ -352,17 +321,14 @@
 				}
 			}
 
-			// 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);
-
 			CelestialBody bodyOccludingKerbin = null;
 
-			double kerbinSqrDistance = this.vessel.sqrDistanceTo(Kerbin);
-
-			System.Text.StringBuilder log = new System.Text.StringBuilder();
-
-			log.AppendFormat("{0}: Search done, figuring status.", this.moduleRef.ToString());
+			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))
@@ -430,6 +396,10 @@
 					// 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;
 					}
@@ -497,9 +467,22 @@
 				}
 			}
 
-			log.AppendFormat("{0}: Status determination complete.", this.moduleRef.ToString());
-
-			Tools.PostLogMessage(log.ToString());
+			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);
+		}
+
+		public override string ToString()
+		{
+			if (this is ProtoAntennaRelay)
+			{
+				return (this as ProtoAntennaRelay).ToString();
+			}
+			return this.moduleRef.ToString();
 		}
 
 		/// <summary>
@@ -511,7 +494,7 @@
 			this.moduleRef = module;
 
 			this.searchTimer = new System.Diagnostics.Stopwatch();
-			this.millisecondsBetweenSearches = 1250;
+			this.millisecondsBetweenSearches = 125L;
 		}
 	}
 }

--- a/IAntennaRelay.cs
+++ b/IAntennaRelay.cs
@@ -31,49 +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; }
 
-		IAntennaRelay nearestRelay { get; }
-
-		IAntennaRelay bestOccludedRelay { 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
@@ -82,10 +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;
@@ -121,11 +121,23 @@
 		{
 			get
 			{
-				return base.vessel;
-			}
-		}
-
-		public IAntennaRelay nearestRelay
+				if (base.vessel != null)
+				{
+					return base.vessel;
+				}
+				else if (this.part != null)
+				{
+					return this.part.vessel;
+				}
+
+				else
+				{
+					return null;
+				}
+			}
+		}
+
+		public IAntennaRelay targetRelay
 		{
 			get
 			{
@@ -134,43 +146,17 @@
 					return null;
 				}
 
-				return this.relay.nearestRelay;
-			}
-		}
-
-		public IAntennaRelay bestOccludedRelay
+				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 null;
-				}
-
-				return this.relay.bestOccludedRelay;
-			}
-		}
-
-		public IAntennaRelay targetRelay
-		{
-			get
-			{
-				if (this.relay == null)
-				{
-					return null;
-				}
-
-				return this.relay.targetRelay;
-			}
-		}
-
-		// Returns the distance to the nearest relay or Kerbin, whichever is closer.
-		public double transmitDistance
-		{
-			get
-			{
-				if (this.relay == null)
-				{
 					return double.PositiveInfinity;
 				}
 
@@ -187,12 +173,12 @@
 		}
 
 		// Returns the maximum distance this module can transmit
-		public float maxTransmitDistance
+		public double maxTransmitDistance
 		{
 			get
 			{
 				// TODO: Cache this in a way that doesn't break everything.
-				return Mathf.Sqrt(this.maxPowerFactor) * this.nominalRange;
+				return Math.Sqrt(this.maxPowerFactor) * this.nominalRange;
 			}
 		}
 
@@ -268,31 +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;
 			}
 		}
 
@@ -389,11 +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,
@@ -415,11 +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(
@@ -473,27 +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);
 			}
@@ -593,27 +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();
 			}
@@ -687,12 +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.
-
 		[KSPEvent (guiName = "Show Debug Info", active = true, guiActive = true)]
 		public void DebugInfo()
 		{
@@ -712,10 +689,9 @@
 				"DataRate: {9}\n" +
 				"DataResourceCost: {10}\n" +
 				"TransmitterScore: {11}\n" +
-				"NearestRelay: {12}\n" +
-				"BestOccludedRelay: {13}\n" +
-				"KerbinDirect: {14}\n" +
-				"Vessel ID: {15}",
+				"targetRelay: {12}\n" +
+				"KerbinDirect: {13}\n" +
+				"Vessel ID: {14}",
 				this.name,
 				this._basepacketSize,
 				base.packetSize,
@@ -728,8 +704,7 @@
 				this.DataRate,
 				this.DataResourceCost,
 				ScienceUtil.GetTransmitterScore(this),
-				this.relay.nearestRelay == null ? "null" : this.relay.nearestRelay.ToString(),
-				this.relay.bestOccludedRelay == null ? "null" : this.relay.bestOccludedRelay.ToString(),
+				this.relay.targetRelay == null ? "null" : this.relay.targetRelay.ToString(),
 				this.KerbinDirect,
 				this.vessel.id
 				);
@@ -751,11 +726,12 @@
 
 			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/ProtoAntennaRelay.cs
+++ b/ProtoAntennaRelay.cs
@@ -62,7 +62,7 @@
 		/// 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
 			{
@@ -71,25 +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;
 			}
 		}
 
@@ -101,7 +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)
 				));
@@ -114,7 +108,7 @@
 		{
 			return string.Format(
 				"{0} on {1}",
-				this.title,
+				this.Title,
 				this.protoPart.pVesselRef.vesselName
 			);
 		}

--- a/RelayExtensions.cs
+++ b/RelayExtensions.cs
@@ -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
 	}
 }