BOTH INTERNATIONAL & INLAND You are underway in thick fog. You have not determined if risk of collision exists. Which statement is TRUE?

Correct Answer: Option A — Your speed must be reduced to bare steerageway.

Rule 6 requires every vessel to proceed at a safe speed at all times. In restricted visibility, if a vessel has not determined that a risk of collision exists, it must reduce speed to the minimum necessary to maintain steerageway to ensure adequate time for evasive action.