Search & Rescue Practice Questions

1. The search pattern that begins at datum and works outward in a growing square spiral is the:

• A.Expanding square search✓
• B.Parallel track search
• C.Contour search
• D.Sector search

Why: The expanding square search starts at datum and spirals outward in increasingly long, square legs — best for a small area with a well-established datum and a single search unit.

2. To cover a large area with an uncertain survivor position, usually with several units, you would use a:

• A.Williamson turn
• B.Sector search
• C.Parallel track (sweep) search✓
• D.Expanding square

Why: Parallel track (sweep) searches cover large areas with evenly spaced parallel legs, well suited to multiple search units and a less certain datum.

3. The man-overboard turn that returns the vessel to a reciprocal course and back over its track, useful at night or in reduced visibility, is the:

• A.Williamson turn✓
• B.Race-track turn
• C.Sector turn
• D.Anderson turn

Why: The Williamson turn brings the vessel onto a reciprocal heading and back down its original track to the MOB position — slower but reliable when the person is out of sight.

4. The unit that coordinates the search effort among the craft at the scene is the:

• A.Datum marker buoy
• B.Rescue Coordination Center
• C.On-Scene Coordinator (OSC)✓
• D.NAVTEX station

Why: The On-Scene Coordinator (OSC) directs and coordinates the SAR units operating at the scene, reporting to the Rescue Coordination Center ashore.

5. Your immediate first action when a person falls overboard is to:

• A.Throw a flotation device, shout 'Man overboard,' post a lookout and mark the position✓
• B.Send a DSC distress alert
• C.Launch the rescue boat
• D.Begin a search pattern

Why: Instantly throw a lifebuoy/flotation aid to the victim, raise the alarm ('Man overboard'), post a dedicated lookout pointing at the person, and mark the position (MOB button) before maneuvering.