diff --git a/OpenRA.Game/Shroud.cs b/OpenRA.Game/Shroud.cs
index b2a127b504..0d912a3557 100644
--- a/OpenRA.Game/Shroud.cs
+++ b/OpenRA.Game/Shroud.cs
@@ -98,7 +98,12 @@ namespace OpenRA
 			
 			return IsExplored(x,y);
 		}
-
+		
+		public void ResetExplored()
+		{
+			explored = new bool[map.MapSize, map.MapSize];
+		}
+		
 		Rectangle MakeRect(int2 center, int range)
 		{
 			return new Rectangle(center.X - range, center.Y - range, 2 * range + 1, 2 * range + 1);
diff --git a/OpenRA.Mods.RA/Crates/ResetRadarCrateAction.cs b/OpenRA.Mods.RA/Crates/ResetRadarCrateAction.cs
new file mode 100644
index 0000000000..f893855d6c
--- /dev/null
+++ b/OpenRA.Mods.RA/Crates/ResetRadarCrateAction.cs
@@ -0,0 +1,41 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	class HideMapCrateActionInfo : CrateActionInfo
+	{
+		public override object Create(Actor self) { return new HideMapCrateAction(self, this); }
+	}
+
+	class HideMapCrateAction : CrateAction
+	{
+		public HideMapCrateAction(Actor self, HideMapCrateActionInfo info)
+			: base(self, info) {}
+
+		public override void Activate(Actor collector)
+		{
+			collector.Owner.Shroud.ResetExplored();
+			base.Activate(collector);
+		}
+	}
+}
diff --git a/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj b/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj
index 73fe0027ef..83348235b5 100644
--- a/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj
+++ b/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj
@@ -78,6 +78,7 @@
     <Compile Include="Spy.cs" />
     <Compile Include="SpyPlanePower.cs" />
     <Compile Include="Thief.cs" />
+    <Compile Include="Crates\ResetRadarCrateAction.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\OpenRA.FileFormats\OpenRA.FileFormats.csproj">
diff --git a/mods/ra/rules.yaml b/mods/ra/rules.yaml
index f7c9b0ff8e..63ced32d24 100644
--- a/mods/ra/rules.yaml
+++ b/mods/ra/rules.yaml
@@ -659,6 +659,9 @@ CRATE:
 	ExplodeCrateAction@boom:
 		Weapon: CrateExplosion
 		SelectionShares: 5
+	HideMapCrateAction:
+		SelectionShares: 10
+		Effect: hide-map
 	Unit:
 		HP: 1
 	RenderUnit: