What is the FIRE acronym?
Find
Inform
Restrict
Extinguish
What is the margin line?
It is 76mm below the bulkhead deck and if immersed it is considered that there is no reserve of buoyancy.
What is the floodable length?
Maximum length of the ship which can be flooded without causing the margin line to be immersed.
What is the Permissible length?
maximum length of the ship at any point that can be flooded is less than the caused by flooding the floodable length.
What is Foundering?
When a vessel has sunk below the margin line.