NAVY SEAL Naval Special Warfare Basic Training Command. Inflatable boat shape coin. Dimension- 4″ x 2.5″ inches (100 mm x 63 mm). Weight: 4 oz. Nice coin and highly sought after for collectors. The item “NAVY SEAL NSW Naval Special Warfare Basic Training CMD Boat Shape Challenge Coin” is in sale since Saturday, March 18, 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.