- Small vessels constructed of wood or fiberglass are difficult to detect by radar.
- Even if producing a radar return, small vessels can be obscured by the trough of passing swells and make for intermittent radar targets.
- The NTSB investigated a casualty in which two vessels—a 23-foot-long center-console boat with a fiberglass hull and a 154-foot-long US Coast Guard cutter—collided.
Early detection of a vessel is one of the best ways to avoid collision. Owners of...
https://mfame.guru/reducing-collision-risk-through-small-vessel-detectability-improvement/