Parts of the submarine that are left behind in the level will stay there, it's possible to leave the level without the main sub (e.g. in an escape shuttle)

Subsurface/Source/GameSession/GameModes/SinglePlayerMode.cs

@@ -145,12 +145,12 @@ namespace Barotrauma
 
             if (Submarine.MainSub == null) return;
 
-            if (Submarine.MainSub.AtEndPosition)
+            if (Submarine.Loaded.Any(s=> s.AtEndPosition))
             {
                 endShiftButton.Text = "Enter " + Map.SelectedLocation.Name;                
                 endShiftButton.Draw(spriteBatch);
             }
-            else if (Submarine.MainSub.AtStartPosition)
+            else if (Submarine.Loaded.Any(s => s.AtStartPosition))
             {
                 endShiftButton.Text = "Enter " + Map.CurrentLocation.Name;
                 endShiftButton.Draw(spriteBatch);
@@ -204,6 +204,24 @@ namespace Barotrauma
                     Map.MoveToNextLocation();
                 }
 
+                if (!Submarine.MainSub.AtEndPosition && !Submarine.MainSub.AtStartPosition)
+                {
+                    Submarine newMainSub = Submarine.Loaded.Find(s => s.AtEndPosition || s.AtStartPosition);
+                    Submarine oldMainSub = Submarine.MainSub;
+                    Submarine.MainSub = newMainSub;
+
+                    GameMain.GameSession.Submarine = newMainSub;
+
+                    List<Submarine> subsToLeaveBehind = Submarine.Loaded.FindAll(s => s != Submarine.MainSub && !Submarine.MainSub.DockedTo.Contains(s));
+
+                    foreach (Submarine sub in subsToLeaveBehind)
+                    {
+                        MapEntity.mapEntityList.RemoveAll(e => e.Submarine == sub && e is LinkedSubmarine);
+                        LinkedSubmarine.CreateDummy(newMainSub, sub);
+                    }
+                }
+
+
                 SaveUtil.SaveGame(GameMain.GameSession.SaveFile);
             }
 

Subsurface/Source/GameSession/GameSession.cs

@@ -54,6 +54,7 @@ namespace Barotrauma
         public Submarine Submarine
         {
             get { return submarine; }
+            set { submarine = value; }
         }
 
         public string SaveFile

Subsurface/Source/Map/LinkedSubmarine.cs

@@ -36,6 +36,7 @@ namespace Barotrauma
 
         private string filePath;
 
+        private bool loadSub;
         private Submarine sub;
 
         private XElement saveElement;
@@ -57,6 +58,14 @@ namespace Barotrauma
             InsertToList();
         }
 
+        public static LinkedSubmarine CreateDummy(Submarine mainSub, Submarine linkedSub)
+        {
+            LinkedSubmarine sl = new LinkedSubmarine(mainSub);
+            sl.sub = linkedSub;
+
+            return sl;
+        }
+        
         public static LinkedSubmarine CreateDummy(Submarine mainSub, string filePath, Vector2 position)
         {
             XDocument doc = Submarine.OpenFile(filePath);
@@ -280,15 +289,32 @@ namespace Barotrauma
             }
             else
             {
-                if (!sub.DockedTo.Contains(Submarine.MainSub)) return null;
 
                 saveElement = new XElement("LinkedSubmarine");
 
+
                 sub.SaveToXElement(saveElement);
             }
 
-            if (saveElement.Attribute("pos") != null) saveElement.Attribute("pos").Remove();
-            saveElement.Add(new XAttribute("pos", ToolBox.Vector2ToString(Position - Submarine.HiddenSubPosition)));
+            if (sub != null)
+            {
+                if (!sub.DockedTo.Contains(Submarine.MainSub))
+                {
+                    saveElement.Add(new XAttribute("location", Level.Loaded.Seed));
+                    saveElement.Add(new XAttribute("worldpos", ToolBox.Vector2ToString(sub.SubBody.Position)));
+
+                }
+                else 
+                {
+                    if (saveElement.Attribute("location") != null) saveElement.Attribute("location").Remove();
+                    if (saveElement.Attribute("worldpos") != null) saveElement.Attribute("worldpos").Remove();
+                }
+                            
+                if (saveElement.Attribute("pos") != null) saveElement.Attribute("pos").Remove();
+                saveElement.Add(new XAttribute("pos", ToolBox.Vector2ToString(Position - Submarine.HiddenSubPosition)));
+            }
+
+
 
             parentElement.Add(saveElement);
 
@@ -313,6 +339,15 @@ namespace Barotrauma
                 linkedSub = new LinkedSubmarine(submarine);
                 linkedSub.saveElement = element;
 
+                string levelSeed = ToolBox.GetAttributeString(element, "location", "");
+                if (!string.IsNullOrWhiteSpace(levelSeed) && GameMain.GameSession.Level != null && GameMain.GameSession.Level.Seed != levelSeed)
+                {
+                    linkedSub.loadSub = false;
+                    return;
+                }
+
+                linkedSub.loadSub = true;
+
                 linkedSub.rect.Location = pos.ToPoint();
             }
 
@@ -332,11 +367,22 @@ namespace Barotrauma
 
         public override void OnMapLoaded()
         {
-            if (Screen.Selected == GameMain.EditMapScreen) return;
+            if (!loadSub) return;
 
             sub = Submarine.Load(saveElement, false);            
-            sub.SetPosition(WorldPosition - Submarine.WorldPosition);
-            sub.Submarine = Submarine;
+
+            Vector2 worldPos = ToolBox.GetAttributeVector2(saveElement, "worldpos", Vector2.Zero);
+            if (worldPos != Vector2.Zero)
+            {
+                sub.SetPosition(worldPos);
+            }
+            else
+            {
+                sub.SetPosition(WorldPosition - Submarine.WorldPosition);
+                sub.Submarine = Submarine;
+            }
+            
+            
             
             var linkedItem = linkedTo.FirstOrDefault(lt => (lt is Item) && ((Item)lt).GetComponent<DockingPort>() != null);
 

Subsurface/Source/Map/Submarine.cs

@@ -191,6 +191,7 @@ namespace Barotrauma
         public string FilePath
         {
             get { return filePath; }
+            set { filePath = value; }
         }
 
         public bool AtDamageDepth

Subsurface/Source/Map/SubmarineBody.cs

@@ -390,7 +390,10 @@ namespace Barotrauma
             damagePos += submarine.Position + submarine.HiddenSubPosition;
             SoundPlayer.PlayDamageSound(DamageSoundType.Pressure, 50.0f, damagePos, 10000.0f);
 
-            GameMain.GameScreen.Cam.Shake = depth * PressureDamageMultiplier * 0.1f;
+            if (Character.Controlled != null && Character.Controlled.Submarine == submarine)
+            {
+                GameMain.GameScreen.Cam.Shake = depth * PressureDamageMultiplier * 0.1f;
+            }
 
             Explosion.RangedStructureDamage(damagePos, depth * PressureDamageMultiplier * 50.0f, depth * PressureDamageMultiplier);
             //SoundPlayer.PlayDamageSound(DamageSoundType.StructureBlunt, Rand.Range(0.0f, 100.0f), damagePos, 5000.0f);

Subsurface/Source/Sounds/SoundPlayer.cs

@@ -346,7 +346,7 @@ namespace Barotrauma
         {
             Vector2 bodyPosition = body.DrawPosition;
 
-            PlayDamageSound(damageType, damage, bodyPosition);
+            PlayDamageSound(damageType, damage, bodyPosition, 800.0f);
         }
 
         public static void PlayDamageSound(DamageSoundType damageType, float damage, Vector2 position, float range = 2000.0f)

Subsurface/Source/Utils/SaveUtil.cs

@@ -31,9 +31,13 @@ namespace Barotrauma
 
             try 
             {
+
+
+
                 if (Submarine.MainSub != null)
                 {
-                    Submarine.MainSub.SaveAs(Path.Combine(tempPath, Submarine.MainSub.Name+".sub"));
+                    Submarine.MainSub.FilePath = Path.Combine(tempPath, Submarine.MainSub.Name + ".sub");
+                    Submarine.MainSub.SaveAs(Submarine.MainSub.FilePath);
                 }
             }
             catch (Exception e)