diff --git a/src/ship_cmd.cpp b/src/ship_cmd.cpp
--- a/src/ship_cmd.cpp
+++ b/src/ship_cmd.cpp
@@ -838,8 +838,8 @@ CommandCost CmdBuildShip(TileIndex tile,
  */
 CommandCost CmdSellShip(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 {
-	Vehicle *v = Vehicle::GetIfValid(p1);
-	if (v == NULL || v->type != VEH_SHIP || !CheckOwnership(v->owner)) return CMD_ERROR;
+	Ship *v = Ship::GetIfValid(p1);
+	if (v == NULL || !CheckOwnership(v->owner)) return CMD_ERROR;
 
 	if (HASBITS(v->vehstatus, VS_CRASHED)) return_cmd_error(STR_CAN_T_SELL_DESTROYED_VEHICLE);
 
@@ -884,8 +884,8 @@ CommandCost CmdSendShipToDepot(TileIndex
 		return SendAllVehiclesToDepot(VEH_SHIP, flags, p2 & DEPOT_SERVICE, _current_company, (p2 & VLW_MASK), p1);
 	}
 
-	Vehicle *v = Vehicle::GetIfValid(p1);
-	if (v == NULL || v->type != VEH_SHIP) return CMD_ERROR;
+	Ship *v = Ship::GetIfValid(p1);
+	if (v == NULL) return CMD_ERROR;
 
 	return v->SendToDepot(flags, (DepotCommand)(p2 & DEPOT_COMMAND_MASK));
 }
@@ -908,9 +908,9 @@ CommandCost CmdRefitShip(TileIndex tile,
 	byte new_subtype = GB(p2, 8, 8);
 	uint16 capacity = CALLBACK_FAILED;
 
-	Vehicle *v = Vehicle::GetIfValid(p1);
+	Ship *v = Ship::GetIfValid(p1);
 
-	if (v == NULL || v->type != VEH_SHIP || !CheckOwnership(v->owner)) return CMD_ERROR;
+	if (v == NULL || !CheckOwnership(v->owner)) return CMD_ERROR;
 	if (!v->IsStoppedInDepot()) return_cmd_error(STR_ERROR_SHIP_MUST_BE_STOPPED_IN_DEPOT);
 	if (v->vehstatus & VS_CRASHED) return_cmd_error(STR_CAN_T_REFIT_DESTROYED_VEHICLE);