What does STCW PST training teach about the relationship between a lifejacket and an immersion suit when both are required?

A. Only one of the two should ever be worn at a time, chosen based on water temperature alone

B. Most immersion suits are designed to be worn with a lifejacket either underneath or over the top, depending on the specific suit design — crew should know exactly how their issued equipment is meant to be combined, since wearing them in the wrong order or combination can reduce buoyancy or thermal performance

C. The order in which they are worn makes no practical difference to safety or performance

D. A lifejacket and immersion suit should never be worn together under any circumstances

A. There is no requirement to check personal survival equipment individually — the safety officer checks it on behalf of the whole crew

B. Only once the first boat drill is scheduled, which may be several days after joining

C. Only senior officers need to confirm the location of survival equipment; ratings are shown only during drills

D. Immediately, as part of the mandatory familiarisation process before the vessel sails — every seafarer must know exactly where their personal survival equipment is stowed and confirm it fits and is in good condition, not wait for the first scheduled drill

A. Lifejackets should be worn under outer clothing to keep them protected from sea spray

B. Put on warm clothing first if time allows, then the lifejacket over the top (never under clothing), secure all straps including the crotch strap if fitted, and check the light and whistle are attached and functioning

C. Put the lifejacket on first, then add warm clothing over it for extra insulation

D. Only secure the chest strap — leg/crotch straps are optional and rarely needed in practice