diff --git a/description.ext b/description.ext
index fc424f8..400ebd2 100644
--- a/description.ext
+++ b/description.ext
@@ -2,14 +2,15 @@
 
 class CfgFunctions {
     createShortcuts = 1;
+    #include "scripts\diary\funcs.hpp"                  // ingame documentation (as diary entries in the map screen)
     #include "scripts\arsr\funcs.hpp"                   // enable sound directionfinder
     #include "scripts\stomper\funcs.hpp"                // enable sitting on Stomper UGV
     #include "scripts\craters\funcs.hpp"                // terrain deformation on artillery impacts
     #include "scripts\lgshells\funcs.hpp"               // fix for unreliable vanilla laser guided shells
-    #include "scripts\spot-randomizer\funcs.hpp"        // handle randomization of supply containers
     #include "scripts\tfar-persistence\funcs.hpp"       // restore previous TFAR settings after respawn
-    #include "scripts\grad-loadout\CfgFunctions.hpp"    // Gruppe Adler loadout handling
     #include "scripts\shelltracker\funcs.hpp"           // display of artillery shells for Zeus and streamers
+    #include "scripts\grad-loadout\CfgFunctions.hpp"    // Gruppe Adler loadout handling
+    #include "scripts\spot-randomizer\funcs.hpp"        // handle randomization of supply containers
 };
 
 
diff --git a/initPlayerLocal.sqf b/initPlayerLocal.sqf
index 538dc6c..d49dbe7 100644
--- a/initPlayerLocal.sqf
+++ b/initPlayerLocal.sqf
@@ -72,6 +72,15 @@ fnc_TFAR_Boost_RadioTower_Loop = {
 [fnc_TFAR_Boost_RadioTower_Loop, 2] call CBA_fnc_addPerFrameHandler; 
 
 
+// store last unloaded Mk6 mortar 
+// (as workaround for https://github.com/acemod/ACE3/issues/10010)
+["ace_cargoUnloaded", {
+    params ["_item", "_vehicle", "_unloadType"];
+    if (_item isKindOf "Mortar_01_base_F") then {
+        missionNamespace setVariable ["shootnscoot_lastUnloadedMortar", _item];
+    };    
+}] call CBA_fnc_addEventHandler;
+
 
 // prevent map markers because this would be too easy 
 // --> we want to foster teamplay through radio comms instead
diff --git a/scripts/diary/funcs.hpp b/scripts/diary/funcs.hpp
new file mode 100644
index 0000000..e45001f
--- /dev/null
+++ b/scripts/diary/funcs.hpp
@@ -0,0 +1,8 @@
+class diary {
+    tag = "diary";
+    class functions {
+        file = "scripts\diary\functions";
+        class postInit{postInit = 1;};
+        class placeMortarOnTerrain{};
+    };
+};
diff --git a/scripts/diary/functions/fn_placeMortarOnTerrain.sqf b/scripts/diary/functions/fn_placeMortarOnTerrain.sqf
new file mode 100644
index 0000000..b85a4e1
--- /dev/null
+++ b/scripts/diary/functions/fn_placeMortarOnTerrain.sqf
@@ -0,0 +1,25 @@
+/*/////////////////////////////////////////////////
+Author: Bernhard
+			   
+File: fn_placeMortarOnTerrain.sqf
+Parameters: 
+Return: none
+
+This function is a workaround for a suspected ACE glitch.
+
+During unloading of mortars quite a lot of them disappear. 
+They are then located below the surface.
+
+Using this function they are being brought back to the surface.
+
+See https://github.com/acemod/ACE3/issues/10010 for more information.
+
+*///////////////////////////////////////////////
+
+private _mortar = missionNamespace getVariable "shootnscoot_lastUnloadedMortar";
+
+if (!isNil "_mortar") then {
+	private _pos = getPosATL _mortar;
+	diag_log format ["getPosATL: %1", _pos];	// logging output might help to narrow down the problem
+	_mortar setPosATL [_pos#0, _pos#1, 0];		// place at same x and y coordinate, but with z coordinate on the surface
+};
diff --git a/scripts/diary/functions/fn_postInit.sqf b/scripts/diary/functions/fn_postInit.sqf
new file mode 100644
index 0000000..d455488
--- /dev/null
+++ b/scripts/diary/functions/fn_postInit.sqf
@@ -0,0 +1,13 @@
+if !(hasInterface) exitWith {};
+
+// create root of ingame documentation
+player createDiarySubject ["shootnscoot_diarySubject","Shoot and Scoot"];
+
+// create documentation topics for different game aspects
+
+// mortar docu
+player createDiaryRecord  ["shootnscoot_diarySubject", ["Mortar","During past games quite a few <font color='#00ffff'>Mk6 mortars got lost after unloading them</font> from the vehicle.<br/>
+Using the link below you should be able to restore them.<br/>
+<executeClose expression='call diary_fnc_placeMortarOnTerrain'>Fix lost mortar</executeClose><br/>
+<br/>
+In case it doesn't work for you --> ping Zeus"]];