A snow had been the largest two-masted ship for many centuries. His weight was around 1000 tons. As almost an identical ship to a brig, snow carried the square sails on both fore-mast and main-mast. A snow was also equipped with an additional trysail mast (used during storm to keep a ship from the wind) which was behind the main-mast. These ships were used for both, battle and merchant purposes. Usually around 80 seamen were boarded. A battle version (Naval Snow) was larger and better armed for the military purposes. Up to 10 cannons were mounted on only one gun deck. Mainly used by the British, this type of the ships was commonly employed by Royal Navy for a pirate hunting.