Fuel vapours will linger in the cabin
Fuel vapours will linger in the cabin
You have a high risk of blowing up you boat.
There will certainly be vapour from the fuel present and lighting of any naked flame could cause an explosion of this vapour.
If you do not ventilate your boat after fueling, harmful vapors may accumulate in the confined spaces, increasing the risk of fire or explosion. These fumes are flammable and can create a dangerous environment for anyone on board. Additionally, poor ventilation can lead to carbon monoxide buildup, which poses serious health risks. Properly ventilating the boat helps ensure safety and reduces the likelihood of accidents.
You need to ventilate your boat after refueling to disperse any build-up of flammable fumes - especially petrol (diesel is less dangerous). Any petrol fumes sinking into the bilges could be ignited by a spark from an electrical switch, or when smoking.
extinguisher
Unusually nothing happens. BUT a build-up of fumes is possible under the right conditions. That along with an ignition source (engine starter motor etc..) can cause a catastrophic explosion. Use the blower while fueling and before starts IAW your owners manual.
closing all hatches and doors while refueling
Run the ventilation blower for a minute after fueling.
A huge explosion.
Fire Extinguisher
Gas fumes will stay in the bottom of the boat.