Naval Special Warfare Group Four Challenge Coin. SBT-12 / SBT-20 / SBT-22. Size: 2 inches in diameter. The Naval Special Warfare Group-4, NSWG-4, was established Oct. 2002 as a result of NSW-21 Restructure Force changes. The Group is located at Little Creek, Naval Amphibious Base in Va. She is subordinate to US SOCOM and Naval Special Warfare Command. NSWG-4’s subordinate units are Special Boat Teams 12, 20, and 22. NSWG-4 is tasked to organize, equip and train SWCC crews to assigned combatant craft at the Special Boat Teams to support Naval Special Warfare. The Group is responsible for the development and testing of Combatant craft and associated ordinance and equipment.. She is also responsible for the development and evaluating operational doctrine, tactics and procedures. NSWG-4 monitors and certifies the Combat Readiness of assigned craft and SWCC. Her Operational areas of responsibility is the Worlds coastal and riverine areas. NSWG-4 is a Staff Organization, commanded by a senior SEAL Captain with many departments filled by SEALs and senior SWCC holding positions in Operations, Training and Command Master Chief. The item “Naval Special Warfare Group Four SBT-12 SBT-20 SBT-22 Navy Challenge Coin 4 SEAL” is in sale since Friday, November 10, 2017. This item is in the category “Collectibles\Militaria\Current Militaria (2001-Now)\Original Items\Challenge Coins”. The seller is “vigorous1234″ and is located in Flower Mound, Texas. This item can be shipped worldwide.