Which type of portable lighting may be used to enter a compartment on a tank barge which is NOT gas-free?

Correct Answer: Option C — An explosion-proof, self-contained, battery-fed lamp

Under 46 CFR 35.30, in non-gas-free compartments on tank vessels and barges, only USCG-approved explosion-proof, self-contained, battery-operated safety lamps may be used to eliminate ignition sources in flammable atmospheres.