In determining 'safe speed', all of the following must be taken into account EXCEPT the

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

Answer: (D)

Safe speed is the speed at which you can take proper and effective action to avoid collision given current conditions. When determining it, you must consider how easily your vessel can maneuver and stop (maneuverability), how crowded the area is (traffic density), and how far you can see hazards ahead (visibility), along with other environmental factors like wind, current, and navigational hazards. The maximum horsepower of your vessel doesn’t enter into that calculation; it describes potential power, not the present ability to avoid a collision under the prevailing conditions. So horsepower is the factor that does not belong in determining safe speed.