On 21 February 1915, Endurance, still held fast, drifted to her most southerly latitude, 76° 58′S. Thereafter she began moving with the pack in a northerly direction.[44] On 24 February, Shackleton realised that they would be held in the ice throughout the winter and ordered ship's routine abandoned. The dogs were taken off board and housed in ice-kennels or "dogloos", and the ship's interior was converted to suitable winter quarters for the various groups of men—officers, scientists, engineers, and seamen. A wireless apparatus was rigged, but their location was too remote to receive or transmit signals.[2]