Question 1143 Deck General

The correct answer is D) Verify ullage readings. The reason this is the correct answer is that when towing a liquefied flammable gas barge, the vessel operator is not required to verify the ullage (the unfilled volume) of the barge's cargo tanks. Instead, the operator is required to keep the barge under constant surveillance (A), make periodic inspections of the bilges (B), and have a properly certificated tankerman or at least one credentialed officer on board the towing vessel (C). Verifying the ullage readings is not a specific requirement for the towing vessel operator in this scenario.