In fog, after observing radar and finding risk of collision with a vessel about 2 miles off your port bow, you should:

In fog, after observing radar and finding risk of collision with a vessel about 2 miles off your port bow, you should:

• A. Do nothing until closer
• B. Slow to bare steerageway
• C. Turn to port only
• D. Take avoiding action as soon as possible

Answer: (D)

In fog, you must act decisively to avoid a possible collision as soon as you detect a risk. Radar showing a vessel about two miles off your port bow means there’s a real chance of meeting that vessel if you stay on your current path, and visibility is limited, so you can’t rely on other vessels’ actions or on sight alone. The rule is to take early and positive action to avoid collision, giving you enough time to maneuver and reduce risk. Waiting until the threat is imminent or adjusting speed alone without changing course may not provide sufficient clearance, and turning only in one direction isn’t guaranteed to keep you clear. So taking avoiding action promptly—by altering course and/or adjusting speed to create separation—is the correct approach.

In fog, you must act decisively to avoid a possible collision as soon as you detect a risk. Radar showing a vessel about two miles off your port bow means there’s a real chance of meeting that vessel if you stay on your current path, and visibility is limited, so you can’t rely on other vessels’ actions or on sight alone. The rule is to take early and positive action to avoid collision, giving you enough time to maneuver and reduce risk. Waiting until the threat is imminent or adjusting speed alone without changing course may not provide sufficient clearance, and turning only in one direction isn’t guaranteed to keep you clear. So taking avoiding action promptly—by altering course and/or adjusting speed to create separation—is the correct approach.