Which factor is NOT part of determining safe speed?

• A. The maneuverability of the vessel
• B. Traffic density
• C. Visibility
• D. Maximum horsepower of your vessel

Answer: (D)

Safe speed is the speed at which you can take proper and prudent action to avoid a collision given the current conditions. The factors that set this are how easily your vessel can maneuver, how crowded the area is, and what you can see. If your vessel handles well and can turn or stop quickly, you can maintain a higher safe speed for a given situation. In heavy traffic, you must slow down to account for the uncertain moves of other boats. When visibility is poor, you need to reduce speed so you have enough time to observe, react, and stop if needed. The maximum horsepower of your vessel doesn’t determine safe speed on its own; it influences how fast you could go under ideal conditions, but safety in the moment depends on maneuverability, traffic, and visibility.