A Duke University researcher tested how shore cameras and radar can spot uncrewed surface vessels attacking a protected ship. Adversarial hull patches suppressed camera detection in up to 29% of attempts but never made a drone boat read as benign, while physical disguise could beat both camera and radar checks. A closing-rate check flagged 94 to 95% of disguised direct run-ins at 15 to 20 knots, versus 12% for a speed-only check. Preprint, not yet peer-reviewed.