When ship is in port state, due to the effect of tidal currents and waves, main shaft will rotate cause of blade is impacted by the water, may lead to damage gear box and engine.
The brake device can effectively lock shaft, to prevent rotation. In the condition of ship stopped, the braking device has limit switch, which connected to the console, can effectively avoid the engine start with a lock.
Marine shaft brake device now is widely used in. official ship yacht, support vessel and so on.