Gasoline tank vent lines on board small passenger vessels must be fitted with removable flame screens __________.

Correct Answer: Option A — consisting of a single screen of at least 30 X 30 mesh, corrosion resistant wire

46 CFR 182.440 requires gasoline tank vent lines to be fitted with a single, corrosion-resistant wire screen of at least 30 by 30 mesh. This flame screen prevents external ignition sources from reaching the fuel vapors inside the tank, effectively mitigating the risk of fire or explosion.