When required, the steering gear, whistle, and the means of communication between the pilothouse and the engine room on a passenger vessel shall be tested by an officer of the vessel within a period of not more than how many hours prior to departure?

Correct Answer: Option C — 12

46 CFR 78.17-5 requires that the steering gear, whistle, and communication systems between the pilothouse and engine room be tested by a licensed officer within 12 hours prior to departure. This mandatory pre-departure check ensures critical maneuvering and signaling equipment is fully operational before the vessel enters restricted or open waters.