The no. and location of immersion suit on your ship can always be found in the “fire control and safety plan” of the ship which is always posted on bridge & other conspicuous places.
According to SOLAS CH III, regulation 3.2
Minimum carrying requirements:-
- Each person onboard must have his personal immersion suit +
- Extra immersion suits for the watch keepers (bridge & ECR) &
- Sufficient number of immersion suits at remotely situated survival craft ( exact numbers not mentioned).