They were very fond of one device in particular. When they were positively compelled to ram stem to stem they used to make provision by depressing their own bows as deep as possible in the water, so that while the enemy’s ram struck them high above the water-line, the Rhodian teeth holed the other ship well _below_ the water. After the impact was over and the two ships fell apart the enemy was in a sinking condition, whereas the Rhodian could, by removing his ballast and some of his men aft, elevate his bows well above the water-line. But just as was discovered in modern ironclads fitted with rams, it was found that the rammer often came off as grievously as the rammed. At the battle of Chios in 201 B.C. one galley left her ram in the enemy’s ship, promptly filled and sank. At the battle of Myonnesos in 190 B.C., when a Rhodian ship was ramming an enemy the anchor of the former caught in the latter. The Rhodian ship endeavoured to go astern to clear herself, but as she did so the cable got foul of her oars so that she was incapacitated and captured. During this same battle the Rhodians affixed braziers of fire which hung over the bows. In trying to avoid these, the Syrian ships exposed their broadsides to the Rhodian rams, so that it became a choice of two evils. The Rhodians were fine, able seamen, and well they needed to be. But even with the smart handling of their fast little craft they had all their work cut out to keep off the embarrassing attentions of the Cretan pirates during the second century B.C. On the biggest of their galleys the Rhodians erected deckhouses with portholes for their powerful catapults and archers. The custom of employing fireships, which remained in vogue for many centuries down to the time of the Armada and after, was already being employed by about the year 300 B.C. The Rhodians, too, had their proper organisation in naval matters as distinct from any desultory measures. In the port of Rhodes they had their dockyards, which were kept up at a great cost. And there is something curiously modern in the stringent regulations kept for preserving the dockyard secrets. Any unauthorised person who intruded into certain parts thereof was punished with death. And this strict rule was not peculiar to Rhodes, but obtained at Carthage and elsewhere. In order to protect their harbours against the assaults of the enemy, booms were laid across the entrances, and engines were mounted on merchant ships moored near the harbour-mouth.