Which of the following statements about fuel tank vents is correct?

Fuel tank vents must include a flame arrester. This is a critical safety feature designed to prevent flames from entering the fuel tank through the vent, which could lead to catastrophic explosions or fires. Flame arresters are specifically designed to extinguish any flame that may attempt to travel back through the vent system, thus protecting the flammable fuel vapors within the tank.

In marine environments, where the presence of fuel vapors is a significant safety concern, the implementation of flame arresters is crucial. They ensure that the venting process does not compromise the safety of the vessel. The requirements for fuel tank venting, including the use of flame arresters, are established by standards set forth by organizations like ABYC (American Boat and Yacht Council) and are essential for compliance with safety regulations.

Other options, such as suggesting that the flame arresters are optional or that fuel tank vents serve no safety purpose, diminish the critical role that proper venting and flame arresting systems play in maintaining marine safety. It's important to always adhere to the established guidelines to ensure the highest standards of safety onboard.