BOTH INTERNATIONAL & INLAND In determining "safe speed", all of the following must be taken into account EXCEPT the __________.

Correct Answer: Option C — maximum horsepower of your vessel

Rule 6 lists factors for determining safe speed, including visibility, traffic density, maneuverability, and background lights. Maximum horsepower is not a factor in determining safe speed, as the rule focuses on the vessel's ability to stop and maneuver effectively relative to the environment and external hazards.