The Navy’s Indoor Ocean It’s 240 feet wide, 360 feet long, and holds over twelve million gallon of water. This is the MASK, the maneuvering and seakeeping basin at the Naval Surface Warfare Center at Carderock. Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts Can Danger Give You Super Strength? Why Are There Lakes In This Desert? How do animals experience pain? Why are there so many insects? Are Olympic Gold Medals Really Made of Gold? 107 Year Old Light Bulb! Still Burning!