what was the cause of the explosion of the battleship maine
USS Maine (ACR-1) The cause of Maine's sinking remains a subject of speculation. In 1898, an investigation of the explosion was carried out by a naval board appointed under the McKinley Administration. The consensus of the board was that Maine was destroyed by an external explosion from a mine. However, the validity of this investigation has been challenged. George W. Melville, a chief engineer in the Navy, proposed that a more likely cause for the sinking was from a magazine explosion within the vessel. The Navy's leading ordnance expert, Philip R. Alger, took this theory further by suggesting that the magazines were ignited by a spontaneous fire in a coal bunker.[3] The coal used in Maine was bituminous coal, which is known for releasing firedamp, a gas that is prone to spontaneous explosions. There is stronger evidence that the explosion of Maine was caused by an internal coal fire which ignited the magazines. This was a likely cause of the explosion, rather than the initial hypothesis of a mine. The ship lay at the bottom of the harbor until 1911. A cofferdam was then built around the wreck.[4] The hull was patched up until the ship was afloat, then towed to sea and sunk. The Maine now lies on the sea-bed 3,600 feet (1,100Â m) below the surface.