 It consisted of the outdated battle cruiser Yavuz (ex-Goeben), 4 destroyers, 5-6 submarines, 2 light cruisers, 3 mine-sweepers, 2 gunboats, 3 motor torpedo boats, 4 minelayers and a surveying vessel.The personnel strength was approximately 800 officers and 4,000 men.The Navy lacked all modern appliances for defending coasts and harbours, and the ships were defenceless against air attacks.