Twelve Marines need to reach an island 180 miles offshore. Enemy radar sweeps the skies. Sonar arrays guard the depths. Surface vessels would be spotted and sunk before covering half the distance. Traditional aircraft need runways that don’t exist. Helicopters lack the range. Submarines move too slowly and can’t deliver troops to shore. But there’s a third option—one that flies like an aircraft, lands like a boat, and remains invisible to both radar and sonar by skimming just five feet above the ocean sur