The soldiers of the South East Asian navy customarily fought with boarding actions, so quick firing side-mounted swivel guns were used to counter this. Acehnese large galleys (galleasses) reached 100 m in length and 17 m in breadth, having 3 masts with square sails and topsails; they were propelled by 35 oars on each side and able to carry 700 men. The lancaran was armed with 98 guns: 18 large cannon (five 55-pounders at the bow, one 25-pounder at the stern, the rest were 17 and 18-pounders), 80 falcons and many swivel guns.