What search tactic can improve MOB detection in rough seas?

• A. Sweep the entire sea randomly with no plan.
• B. Wait for the person to surface nearby.
• C. Use a single long line search far from last known position.
• D. Implement a sector or wedge search pattern around the estimated drift location, coordinate with crew, and use markers or radar to track the area.

Answer: (D)

In rough seas, a systematic search around the last known position and expected drift area is the most effective way to find a person overboard. A sector or wedge search pattern concentrates effort in defined portions of the sea, so the team covers the area where the person could have drifted, rather than wandering aimlessly. Coordinating with the crew ensures multiple eyes and tools are used—lookouts, radar, and marks—so no portion of the search area is neglected. Using markers or radar to track what has been searched helps maintain coverage and prevents double-searching the same spots.

This approach accounts for wind, current, and waves that push the person away from the last sighting, making the effort timely and efficient. It also allows quick adjustments as new information comes in, such as changes in drift direction or updated positions from sensors.

In contrast, sweeping randomly offers little guarantee of coverage and wastes precious time; waiting for the person to surface nearby is passive and unreliable in rough seas; relying on a single long line far from the last known position risks missing the target entirely and leaves large areas unsearched.