With the gas turned off at the bottle, what should be done to clear any gas that has already escaped?

A. Switch on every fan and electrical appliance available to clear the air as fast as possible

B. Keep all hatches closed to "contain" the gas in one place

C. Open hatches and ports to ventilate the boat thoroughly, and if there is a bilge blower or fan, use it to help clear any heavier gas that has settled low down — but still avoid any electrical switches that are not already known to be spark-safe

D. Wait exactly five minutes by the clock and then assume it must be fully cleared

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