Once it is safe to investigate, how should the crew try to find where the leak came from?

A. There is no safe way to find a gas leak without professional equipment, so nothing can be checked on board at all

B. Hold a lit match near each joint in turn to see where it flares up

C. With the gas back on briefly and a flame-free check, use a simple soapy water solution brushed onto joints and connections — bubbles forming show exactly where gas is escaping. Never use a flame to search for a leak

D. Guess which part is most likely to be faulty and replace it without checking

A. Light the stove quickly to burn off the smell before it gets worse

B. Switch on the cabin lights to get a better look for the source of the smell

C. Ignore a faint smell since it is probably nothing serious

D. Never light anything, switch on anything electrical, or create any spark near the smell — gas vapour, especially LPG, is heavier than air and can build up invisibly in the bilge, ready to ignite from the smallest spark

A. Leave the gas supply exactly as it is and deal with it later

B. Only turn off the cooker control knob, leaving the main bottle valve open

C. Turn the gas supply up higher to "flush it through" faster

D. Turn off the gas at the bottle itself (the main valve), not just at the cooker — this stops any more gas flowing into the system while the leak is investigated