Special Warfare Combatant-craft crewmen walk to the starting point for an open ocean swim, with water and air temperatures hovering below 40 degrees. Training in these conditions is essential in ensuring they are ready to conduct special warfare missions in similar weather. This particular evolution was a familiarization swim for the newest detachment that will be trained to conduct the Maritime Craft Aerial Deployment System, which involves launching an 11-meter Naval Special Warfare rigid-hulled inflatable boat from a C-17 or C-5, which the SWCC parachute after, often into nearly frozen water.