separates SEALs from all other Special Operations forces. Third Phase trains, develops, and qualifies SEAL candidates in basic weapons, demolition, and small unit tactics. Third Phase concentrates on teaching land navigation, small-unit tactics, patrolling techniques, rappelling, marksmanship, and military explosives. The final three and a half weeks of Third Phase are spent at NALF San Clemente Island, where students apply all the techniques they have acquired during training. SEAL Delivery Vehicle Teams SEAL Delivery Vehicle Teams' (SDVT) historical roots began during WWII with the earliest human torpedoes to see use: Maiale, used by Italy's Decima Flottiglia MAS, and Chariots, used by British commando frogmen. Naval Special Warfare entered the wet submersible field in the 1960s when the Coastal Systems Center in Panama City, Florida developed the Mark 7, a free-flooding SDV of the type used today, and the first SDV to be used in the fleet. The Mark 8 and 9 followed in the late 1970s. Today's Mark 8 Mod 1 provides NSW with an unprecedented capability that combines the attributes of clandestine underwater mobility and the combat swimmer. The Advanced SEAL Delivery System (ASDS) program that would have provided NSW a new (dry) submersible for long range infiltration missions was abandoned in 2009. However, news reports have stated that USSOCOM have purchased a new dry SEAL Delivery Vehicle called the Dry Combat Submersible and will be become operational around 2018/2019. Special Warfare Combatant-craft Crewmen The exclusive mission of Special Warfare Combatant-craft Crewmen (SWCC) operators is to expertly drive and provide large-caliber gunfire support on specialized high-tech, high-speed, and low-profile Surface Combatant Craft to secretly infiltrate and exfiltrate Navy SEALs on Special Operations missions worldwide. These missions include direct action on land, sea, coastline or rivers (such as strikes, captures, and ship take downs by Visit, Board, Search, and Seizure), special reconnaissance, coastal patrol and interdiction of suspect ships and surface craft, counter-terrorism operations, riverine warfare, deception operations, search and rescue operations, and foreign internal defense missions. Although SEALs and SWCC undergo different training programs, both are focused on special operations in maritime environments. The SWCC program includes extensive training on craft and weapons tactics, techniques, and procedures. Like SEALs, SWCC must show physical fitness, possess strong motivation, be combat focused, and maintain responsiveness in high stress situations. The SWCC designation is a relatively new Naval Special Warfare career path that is independent of the regular line Navy. Today's Special