Self-contained portable gas appliances, which have the burner screwed direct to the cylinder or container, such as a camping stove or lamp, have the potential to leak sufficient amounts of LPG into the interior of a boat to create an explosive 'mix'. To minimise the risk of this happening you must store these types of appliances in a cylinder locker or cylinder housing when they're not in use.
There's a real risk of this type of appliance leaking gas or tipping over whilst in use. These appliances must be closely supervised at all times and empty cylinders safely disposed of. [7.15]