Students from Basic Crewman Training Class 68-1 participate in a swimmer surf passage exercise. Students from Basic Crewman Training Class 68-1 participate in a swimmer surf passage exercise at Naval Amphibious Base Coronado on Feb. 17, 2011. Surf passage is one of many physically demanding evolutions that are a part of Special Warfare Combat-Craft Crewman training. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 804677-P-RNQ25-060.jpg Photo Gallery