1. MUSTER STATION is a designated area on the ship where the crew assembles in case of an emergency for attendance checks and further instructions. It is usually marked and equipped with basic life-saving and communication equipment.

2 General alarm is an audio signal consisting of seven short and one long tone from the ship's siren. This combination of tones is a universal emergency signal on board. When the general alarm is activated, it indicates an emergency situation that requires a quick response and possible evacuation. Upon hearing the general alarm, all crew members, without exception, must immediately go to their designated emergency positions, known as Muster Stations. This is a location on the ship where the crew gathers to check attendance, receive further instructions, and organize evacuation if necessary. The crew must take the general alarm seriously and respond promptly according to the ship's safety procedures.

3.Abandon ship alarm, known as the "abandon ship alarm," it typically consists of seven short blasts followed by one long blast of the siren or alarm. This combination of tones serves as a universal signal for the emergency evacuation of the ship. When activated, the abandon ship alarm indicates an extremely urgent situation in which the crew must immediately abandon the ship for their own safety.

4.Fire alarm on the ship, it usually consists of a single long blast of the siren or alarm, which is often repeated to attract the crew's attention. At the same time, the crew is notified via the public address (PA) system about the location of the fire on board. This means that the crew is informed through a voice message or an automatic announcement via loudspeakers about the exact location of the fire or the area where smoke or fire has been detected.

5.MOB alarm on a ship typically consists of three long blasts of the siren or alarm. MOB stands for "Man Overboard," indicating that someone has fallen overboard into the sea. When this signal is activated, it alerts the crew to the urgent need to search for and rescue the person who has fallen from the ship.