What defines a legal operation of a vessel when no speed limit is posted?

• A. Operating at a speed that does not endanger others
• B. Operating at maximum speed
• C. Operating only at dawn
• D. Operating near port

Answer: (A)

In areas with no posted speed limit, the key idea is to operate at a safe speed that can be maintained without endangering others. The law expects you to choose a pace that lets you keep a proper lookout, judge traffic, and stop or maneuver as needed for conditions such as crowding, visibility, weather, and water currents.

That’s why the best choice is to regulate your speed so it does not endanger others. It captures the practical standard of safe, prudent operation in variable conditions, rather than aiming for the fastest possible speed or relying on a time of day or location cue.

The other ideas don’t fit the no-posted-limit rule: maximum speed can create danger in busy waterways; dawn timing or being near port doesn’t define legality in this context.