The open sea and the deep fiords running far into the hills were the best highways of his kingdom, and Olaf spared no effort to maintain a good fighting fleet, the best ships of which lay anchored before his great hall at Trondhjem when he was at home. When he went out to war his path was by the sea. He hunted down the pirates and destroyed their strongholds in the northern fiords, with none the less zeal because these places were also the last refuge of the old paganism and its Berserker magicians. He had built for his own use a ship called the "Crane" (_Tranen_), longer than ships were usually made at the time, and also of narrower beam. Her additional length enabled more oars to be used, and her sharp bow, carved into a bird's head, and her graceful lines made her the fastest ship in the fiords when a good crew of rowers was swinging to the oars. A good rowing-boat is generally a bad sailer, but Olaf had made the "Crane" swift enough under canvas, or to speak more accurately, when her sails of brightly dyed wool were spread. She was given high bulwarks, and must have had more than the usual four-foot draught of water, for she carried plenty of heavy stone ballast to stiffen her under sail. With the "Crane" as his flagship, Olaf sailed northward to attack the Viking Raud, pirate and magician, who held out for the old gods and the old wild ways. Raud had another exceptionally large ship, the longest in Norway, and till the "Crane" was built the swiftest also. The bow, carved into a dragon's head and covered with brazen scales, gave Raud's ship the name of the "Serpent" (_Ormen_). As Olaf sailed northward Raud and his allies met him in a skirmish at sea, but soon gave way to superior numbers, and Raud, when he steered the "Serpent" into the recesses of Salten Fiord, thought he had shaken off pursuit, especially as the weather had broken, and wild winds, stormy seas, and driving mists and rain squalls might well make the fiord inaccessible to Olaf's fleet. Raud sat late feasting and drinking, and in the early morning he still lay in a drunken sleep when the "Crane" slipped into the fiord despite mist and storm, and Olaf seized the dragon ship and made Raud a prisoner almost without striking a blow.