Vietnam, from the Mekong Delta (Sea Float), the Parrot's Beak and French canal AO's through I Corps and the Song Cui Dai estuary south of Da Nang. UDT's provided infiltration and extraction for assigned SEAL team assault squads along the rivers. Navy SEALs & SWCC Naval Special Warfare personnel comprise less than one percent of U.S. Navy personnel. SEAL and Special Warfare Combatant-craft Crewmen (SWCC) units operate across the spectrum of conflict and in operations other than war in a controlled manner; their ability to provide real time intelligence and "eyes on target", offer decision makers immediate options in the face of rapidly changing world crises. SEALs SEALs are Special Operations Command's force-of-choice to conduct small-unit maritime military operations which originate from, and return to a river, ocean, swamp, delta or coastline. This littoral capability is considered more important now than ever, as half the world's infrastructure and population is located within one mile (1.6 km) of an ocean or river. Responding to President John F. Kennedy's desire for the Services to develop an Unconventional Warfare (UW) capability, the U.S. Navy established SEAL Team One and SEAL Team Two in January 1962. Formed entirely with personnel from Underwater Demolition Teams, the SEALs mission was to conduct counter guerrilla warfare and clandestine operations in maritime and riverine environments. Navy SEALs have distinguished themselves as an individually reliable, collectively disciplined and highly skilled maritime force. Because of the dangers inherent in NSW, prospective SEALs go through what is considered by many military experts to be the toughest training in the world. The intense physical and mental conditioning it takes to become a SEAL begins at Basic Underwater Demolition/SEAL (BUD/S) training. SEAL candidates begin BUD/S training at the Naval Special Warfare Center, NAB Coronado, California. This six-month course of instruction focuses on physical conditioning, small boat handling, diving physics, basic diving techniques, land warfare, weapons, demolitions, communications, and reconnaissance. First Phase trains, develops, and assesses SEAL candidates in physical conditioning, water competency, teamwork, and mental tenacity. Second (Diving) Phase trains, develops, and qualifies SEAL candidates as competent basic combat swimmers. During this period, physical training continues and becomes even more intensive. Emphasis is placed on long distance underwater dives with the goal of training students to become basic combat divers, using swimming and diving techniques as a means of transportation from their launch point to their combat objective. This is a skill that