diff --git a/AirplaneWithRadar/AirplaneWithRadar/DrawingObjectAirplane.cs b/AirplaneWithRadar/AirplaneWithRadar/DrawingObjectAirplane.cs
index 252c1bd..c3765ed 100644
--- a/AirplaneWithRadar/AirplaneWithRadar/DrawingObjectAirplane.cs
+++ b/AirplaneWithRadar/AirplaneWithRadar/DrawingObjectAirplane.cs
@@ -33,5 +33,48 @@ namespace AirplaneWithRadar
         public string GetInfo() => _airplane?.GetDataForSave();
         public static IDrawingObject Create(string data) => new DrawingObjectAirplane(data.CreateDrawingAirplane());
 
+        public bool Equals(IDrawingObject? other)
+        {
+            if (other == null)
+            {
+                return false;
+            }
+            var otherAirplane = other as DrawingObjectAirplane;
+            if (otherAirplane == null)
+            {
+                return false;
+            }
+            var airplane = _airplane.Airplane;
+            var otherAirplaneAirplane = otherAirplane._airplane.Airplane;
+            if (airplane.Speed != otherAirplaneAirplane.Speed)
+            {
+                return false;
+            }
+            if (airplane.Weight != otherAirplaneAirplane.Weight)
+            {
+                return false;
+            }
+            if (airplane.BodyColor != otherAirplaneAirplane.BodyColor)
+            {
+                return false;
+            }
+            // TODO доделать проверки в случае продвинутого объекта
+            if (airplane is EntityAirplaneWithRadar airpl && otherAirplaneAirplane is EntityAirplaneWithRadar otherAirpl)
+            {
+                if (airpl.DopColor != otherAirpl.DopColor)
+                {
+                    return false;
+                }
+                if (airpl.Radar != otherAirpl.Radar)
+                {
+                    return false;
+                }
+                if (airpl.ExtraFuelTank != otherAirpl.ExtraFuelTank)
+                {
+                    return false;
+                }
+            }
+            return true;
+        }
     }
 }
diff --git a/AirplaneWithRadar/AirplaneWithRadar/IDrawingObject.cs b/AirplaneWithRadar/AirplaneWithRadar/IDrawingObject.cs
index 35c63ab..36a1535 100644
--- a/AirplaneWithRadar/AirplaneWithRadar/IDrawingObject.cs
+++ b/AirplaneWithRadar/AirplaneWithRadar/IDrawingObject.cs
@@ -3,7 +3,7 @@
     /// <summary>
     /// Интерфейс для работы с объектом, прорисовываемым на форме
     /// </summary>
-    internal interface IDrawingObject
+    internal interface IDrawingObject : IEquatable<IDrawingObject>
     {
         /// <summary>
         /// Шаг перемещения объекта
diff --git a/AirplaneWithRadar/AirplaneWithRadar/MapWithSetAirplanesGeneric.cs b/AirplaneWithRadar/AirplaneWithRadar/MapWithSetAirplanesGeneric.cs
index 20d539d..fbe21f0 100644
--- a/AirplaneWithRadar/AirplaneWithRadar/MapWithSetAirplanesGeneric.cs
+++ b/AirplaneWithRadar/AirplaneWithRadar/MapWithSetAirplanesGeneric.cs
@@ -13,7 +13,7 @@ namespace AirplaneWithRadar
     /// <typeparam name="T"></typeparam>
     /// <typeparam name="U"></typeparam>
     internal class MapWithSetAirplanesGeneric<T, U>
-        where T : class, IDrawingObject
+        where T : class, IDrawingObject, IEquatable<T>
         where U : AbstractMap
     {
         /// <summary>
diff --git a/AirplaneWithRadar/AirplaneWithRadar/SetAirplanesGeneric.cs b/AirplaneWithRadar/AirplaneWithRadar/SetAirplanesGeneric.cs
index 43b5ce2..9b0fc52 100644
--- a/AirplaneWithRadar/AirplaneWithRadar/SetAirplanesGeneric.cs
+++ b/AirplaneWithRadar/AirplaneWithRadar/SetAirplanesGeneric.cs
@@ -11,7 +11,7 @@ namespace AirplaneWithRadar
     /// </summary>
     /// <typeparam name="T"></typeparam>
     internal class SetAirplanesGeneric<T>
-        where T : class
+        where T : class, IEquatable<T>
     {
         /// <summary>
         /// Список объектов, которые храним
@@ -59,6 +59,10 @@ namespace AirplaneWithRadar
         {
             // TODO проверка позиции
             // TODO вставка по позиции
+            if (_places.Contains(airplane))
+            {
+                throw new ArgumentException($"Данный объект ({airplane}) уже есть в наборе");
+            }
             if (position < 0 || position >= _maxCount)
             {
                 throw new StorageOverflowException(_maxCount);