What is a major concern when handling flammable liquids on a vessel?

The primary concern when handling flammable liquids on a vessel is the risk of fire and explosion. Flammable liquids can easily ignite and lead to highly dangerous situations, posing significant safety hazards to crew members, the vessel, and the environment. These substances can release vapors that are lighter than air, potentially spreading and accumulating in confined or low-lying areas, which increases the likelihood of a fire or explosion.

Proper safety protocols, such as the use of appropriate personal protective equipment, proper storage techniques, and effective ventilation systems, are critical in mitigating these risks. Understanding the properties of the flammable liquids being handled, such as flash points and vapor densities, is essential in protecting both personnel and the vessel while performing tasks related to these materials.

The other options, while they may present challenges during operations, do not capture the primary hazard associated with flammable liquids as accurately as the risk of fire and explosion does.