What is a key safety measure while filling the fuel tank of a vessel?

Keeping the nozzle in contact with the tank while filling the fuel tank of a vessel is essential for safety. This practice helps prevent the buildup of static electricity, which can ignite fumes and cause a fire or explosion. When the nozzle is in contact with the tank, it provides a continuous path for static electricity to discharge safely, reducing the risk of sparks that could ignite gasoline vapors.

Additionally, ensuring that there is no gap between the nozzle and the tank minimizes the chances of spillage and allows for a more controlled and precise filling process. This is particularly important because spilled fuel can not only be hazardous but also environmentally damaging. Adopting this safety measure significantly contributes to a safer fuel filling experience while operating a vessel.