Task Unit One / TU-1. Warriors From The Sea. Condition : used, and in nice shape. This coin is 2 inches wide by 3 inches high. (SDV) and a Dry Deck Shelter. The normal table of organization includes three task units and a headquarters element. Each SDV Task Unit operates independently from a host submarine in the conduct of Naval Special Warfare missions. SDVT-1 conducts operations throughout the Pacific. Command’s and Central. Command’s geographic areas of responsibility. Never personally given any of the coins. All coins are guaranteed to be in excellent condition unless otherwise specified above. The free listing tool.