Recognised by 7 short ringings of the bell or horn signal followed by a long ring.
If there's a fire, its crew should raise the alarm signal by pressing the nearest fire switch, ringing continuously.
Recognized by 3 long rings to notify the crew onboard when a man falls overboard, along with 3 long blasts on the ship.
When the emergency on board ship goes out of hand, the signal for abandon ship is given verbally by captain.
If a navigational equipment malfunctions, a continuous alarm signal on the bridge will be sounded.
If any machinery in the engine room malfunctions, a common engine room alarm notifies the engine officer on duty.
A distinct alarm activates on opening the release cabinet door, which is used to release the CO2 bottle banks.
The ship’s cargo spaces are also fitted with a fixed firefighting system that has a distinct alarm when operated.
It is silent sounded in a pirate attack, notifying different coastal authorities about it via a global satellite system.