diff --git a/AirPlaneWithRadar/AirPlaneWithRadar/FormMapWithSetPlains.cs b/AirPlaneWithRadar/AirPlaneWithRadar/FormMapWithSetPlains.cs
index 2febce7..8624783 100644
--- a/AirPlaneWithRadar/AirPlaneWithRadar/FormMapWithSetPlains.cs
+++ b/AirPlaneWithRadar/AirPlaneWithRadar/FormMapWithSetPlains.cs
@@ -117,6 +117,8 @@ namespace AirPlaneWithRadar
             {
                 return;
             }
+            if (maskedTextBoxPosition.Text == null)
+                return;
             int pos = Convert.ToInt32(maskedTextBoxPosition.Text);
             if ((_mapsCollection[listBoxMaps.SelectedItem?.ToString() ?? string.Empty] - (pos - 1)) != null)
             {
diff --git a/AirPlaneWithRadar/AirPlaneWithRadar/MapWithSetPlainGeneric.cs b/AirPlaneWithRadar/AirPlaneWithRadar/MapWithSetPlainGeneric.cs
index 457fbe3..37316eb 100644
--- a/AirPlaneWithRadar/AirPlaneWithRadar/MapWithSetPlainGeneric.cs
+++ b/AirPlaneWithRadar/AirPlaneWithRadar/MapWithSetPlainGeneric.cs
@@ -113,44 +113,33 @@ namespace AirPlaneWithRadar
         }
         private void DrawPlains(Graphics g)
         {
-
-
             int CountWidth = _pictureWidth / _placeSizeWidth;
 
             int x = _pictureWidth - _placeSizeWidth;
             int y = _placeSizeHeight / 4;
-
-            for (int k = 0; k < _setPlains.Count; k++)
+            int k = 0;
+            foreach(var plain in _setPlains.GetPlains())
             {
-                if (_setPlains[k] != null)
-                {
+                
                     if ((k + 1) % CountWidth != 0 || k == 0)
                     {
-                        _setPlains[k]?.SetObject(x, y, _pictureWidth, _pictureHeight);
-                        _setPlains[k]?.DrawningObject(g);
+                        plain?.SetObject(x, y, _pictureWidth, _pictureHeight);
+                        plain?.DrawningObject(g);
                         x -= _placeSizeWidth;
                     }
                     else
                     {
 
-                        _setPlains[k]?.SetObject(x, y, _pictureWidth, _pictureHeight);
-                        _setPlains[k]?.DrawningObject(g);
-                        x = _pictureWidth - _placeSizeWidth - _placeSizeWidth / 2 - _placeSizeWidth / 4;
+                        plain?.SetObject(x, y, _pictureWidth, _pictureHeight);
+                        plain?.DrawningObject(g);
+                        x = _pictureWidth - _placeSizeWidth ;
                         y += _placeSizeHeight;
 
                     }
-                }
-                if (_setPlains[k] == null)
-                {
-                    if ((k + 1) % CountWidth != 0 || k == 0)
-                        x -= _placeSizeWidth;
-                    else
-                    {
-                        x = _pictureWidth - _placeSizeWidth - _placeSizeWidth / 2 - _placeSizeWidth / 4;
-                        y += _placeSizeHeight;
-                    }
-                }
+                
+                k++;
             }
+            
 
         }
     }
diff --git a/AirPlaneWithRadar/AirPlaneWithRadar/MapsCollection.cs b/AirPlaneWithRadar/AirPlaneWithRadar/MapsCollection.cs
index 0dfb5ea..abbd72a 100644
--- a/AirPlaneWithRadar/AirPlaneWithRadar/MapsCollection.cs
+++ b/AirPlaneWithRadar/AirPlaneWithRadar/MapsCollection.cs
@@ -25,13 +25,19 @@ namespace AirPlaneWithRadar
 
         public void AddMap(string name, AbstractMap map)
         {
-            
+            if (_mapStorages.ContainsKey(name))
+                return;
+            Keys.Add(name);
+            _mapStorages.Add(name, new MapWithSetPlainGeneric<DrawingObjectPlane, AbstractMap>(_pictureWidth, _pictureHeight, map));
 
         }
 
         public void DelMap(string name)
         {
-           
+            if (!_mapStorages.ContainsKey(name))
+                return;
+            Keys.Remove(name);
+            _mapStorages.Remove(name);
         }
 
         public MapWithSetPlainGeneric<DrawingObjectPlane, AbstractMap> this[string ind]
@@ -39,7 +45,9 @@ namespace AirPlaneWithRadar
             get
             {
 
-              
+                if (!_mapStorages.ContainsKey(ind))
+                    return null;
+                else
                     return _mapStorages[ind];
             }
         }
diff --git a/AirPlaneWithRadar/AirPlaneWithRadar/SetPlaneGeneric.cs b/AirPlaneWithRadar/AirPlaneWithRadar/SetPlaneGeneric.cs
index 4e83bdd..45b9dc2 100644
--- a/AirPlaneWithRadar/AirPlaneWithRadar/SetPlaneGeneric.cs
+++ b/AirPlaneWithRadar/AirPlaneWithRadar/SetPlaneGeneric.cs
@@ -20,31 +20,57 @@ namespace AirPlaneWithRadar
         }
         public int Insert(T plain)
         {
-            
+            if (_places.Count == _maxCount)
+            {
+                return -1;
+            }
+            _places.Insert(0, plain);
 
-            return 1;
+            return _places.Count;
         }
-        public bool Insert(T plain, int position)
+        public int Insert(T plain, int position)
         {
-           
-            return true;
+            if (position < 0 || _places.Count < position||position > _maxCount)
+                return -1;
+            else if (plain == null)
+                return -1;
+            _places.Insert(position, plain);
+            return position;
 
         }
         public T Remove(int position)
         {
-           
-            return _places[position];
+            T mid;
+            if (position < 0 || _places.Count < position || position > _maxCount)
+                return null;
+            else if (_places[position] == null)
+                return null;
+            else
+            {
+                mid = _places[position];
+                _places.RemoveAt(position);
+            }
+            return mid;
         }
         public T this[int position]
         {
             get
             {
-                
+                if (position < 0 || _places.Count < position || position > _maxCount)
+                    return null;
+                else if (_places[position] == null)
+                    return null;
+                else
                     return _places[position];
             }
             set
             {
-                
+                if (position < 0 || _places.Count < position || position > _maxCount)
+                    return;
+                else if (_places.Count == _maxCount)
+                    return;
+                else
+                    _places[position] = value;
             }
         }
         public IEnumerable<T> GetPlains()