diff --git a/ground-station.py b/ground-station.py
index bf275d5..5968fb5 100644
--- a/ground-station.py
+++ b/ground-station.py
@@ -16,6 +16,15 @@ BOAT_STATE_TERMINATED = -1
 Boats = []
 Clients = []
 
+async def sendToClient(client, msg):
+    if client['state'] != 'terminated' and client['ws'].connected:
+        await client['ws'].send(msg)
+    elif client['state'] != 'kicked':
+        client['state'] = 'terminated'
+        if client['boat'] is not None:
+            client['boat']['state'] = BOAT_STATE_AVAILABLE
+            client['boat'] = None
+
 async def sendToBoat(boat, cmd):
     boat['log'].append({"t": datetime.timestamp(datetime.now()), "type": "tx", "msg": cmd})
     await boat['ws'].send(cmd)
@@ -31,7 +40,7 @@ async def echo_boats(client):
                     data += 'available:'
                 elif boat["state"] == BOAT_STATE_INCTRL:
                     data += 'inctrl:'
-    await client['ws'].send(data)
+    await sendToClient(client, data)
 
 async def echo_locked_boats(client):
     """echo list of all locked boats to client"""
@@ -40,7 +49,7 @@ async def echo_locked_boats(client):
         for boat in Boats:
             if boat['state'] == BOAT_STATE_LOCKED:
                 data += str(boat['id']) + ";" + str(boat['name']) + ";locked:"
-        await client['ws'].send(data + '\n')
+        await sendToClient(client, data)
 
 async def echo_clients(client):
     """echo list of all clients to client"""
@@ -54,7 +63,7 @@ async def echo_clients(client):
             if (clie['boat'] is not None):
                 boatId = clie['boat']['id']
             data += clientId + ";" + boatId + ";" + str(clie['state']) + ":"
-        await client['ws'].send(data + '\n')
+        await sendToClient(client, data)
 
 async def take_controll(client, boat):
     """let a client take controll a boat"""
@@ -67,18 +76,18 @@ async def take_controll(client, boat):
                 b["state"] = BOAT_STATE_INCTRL
                 print("take controll: " + str(client["id"]) + " -> " + b["name"])
                 client["boat"] = b
-                await client['ws'].send("OK")
+                await sendToClient(client, "OK")
                 return
             else:
                 break
-    await client['ws'].send("FAIL")
+    await sendToClient(client, "FAIL")
 
 async def free_boat(boat):
     """make boat available for next client"""
     for client in Clients:
         if client["boat"] is not None and client["boat"]['id'] == boat:
             client["boat"] = None
-            await client['ws'].send("FAIL")
+            await sendToClient(client, "FAIL")
             break
     for b in Boats:
         if b['id'] == boat and b['state'] != BOAT_STATE_TERMINATED:
@@ -90,7 +99,7 @@ async def lock_boat(boat):
     for client in Clients:
         if client["boat"] is not None and client["boat"]['id'] == boat:
             client["boat"] = None
-            await client['ws'].send("FAIL")
+            await sendToClient(client, "FAIL")
             break
     for b in Boats:
         if b['id'] == boat and b['state'] != BOAT_STATE_TERMINATED:
@@ -101,7 +110,7 @@ async def getlog(client, data):
     """send boat log to client"""
     for b in Boats:
         if b['id'] == data[2]:
-            await client['ws'].send("log;" + b['id'] + ";" + json.dumps(b['log']))
+            await sendToClient(client, "log;" + b['id'] + ";" + json.dumps(b['log']))
             return
 
 async def sendcmd(data):