Question 1133 Deck General

The correct answer is C) A red flag (day), red light (night). According to 46 CFR 35.30-1, when a vessel is loading or discharging oil in bulk at a dock, the vessel must display a red flag by day and a red light by night. This signifies that the vessel is engaged in the transfer of flammable or combustible liquid cargo. The regulations require this visual signal to alert others in the area of the hazardous operation taking place. The other answer choices are incorrect. Option A is incorrect because a yellow flag and red light are not the required signals. Option B is incorrect because a signal is required for both loading and discharging oil, not just for gasoline. Option D is incorrect because a green flag and light are not the designated signals for this operation.