Why is it essential to stop fueling if a leak is detected in the fuel hose?

Stopping fueling when a leak is detected in the fuel hose is crucial primarily because it significantly reduces the risk of a fire hazard. Fuel is highly flammable, and a leak can quickly lead to fuel vapors forming in the air, creating an extremely dangerous situation. If these vapors come into contact with an ignition source, it could ignite, leading to a fire or explosion. The immediate action of ceasing fueling helps prevent this scenario, ensuring the safety of the crew and the vessel.

While preventing contamination of water, ensuring regulatory compliance, and maintaining control of the vessel are also important considerations, the immediate danger posed by a fire risk takes precedence. Fire and explosion risks can escalate quickly and result in catastrophic outcomes, making it vital to halt the fueling process at the first sign of a leak.