A hull of such strength would resist a heavy strain, and, should it be subjected to lateral pressure, would in all probability rise out of harm's way. However, to be quite certain of this and to ensure safety in the most extreme case it is necessary that the hull be modelled after the design adopted by Nansen in the 'Fram'. The principal dimensions were, length one hundred and sixty-five feet, breadth thirty feet, and depth eighteen feet. The registered tonnage was three hundred and eighty-six, but the actual carrying capacity we found to be about six hundred tons. The engines, situated aft, were compound, supplied with steam from a single boiler. The normal power registered was ninety-eight horse-power, working a four-bladed propeller, driving it at the rate of sixty or seventy revolutions per minute (six to ten knots per hour). Steam was also laid on to a winch, aft, for handling cargo in the main hold, and to a forward steam-windlass. The latter was mainly used for raising the anchor and manipulating the deep-sea dredging-cable. The ship was square on the foremast and schooner-rigged on the main and mizen masts. Between the engine-room bulkhead and the chain and sail locker was a spacious hold. Six large steel tanks built into the bottom of the hold served for the storage of fresh water and at any time when empty could be filled with seawater, offering a ready means of securing emergency ballast. On the deck, just forward of the main hatch, was a deckhouse, comprising cook's galley, steward's pantry and two laboratories. Still farther forward was a small lamp-room for the storage of kerosene, lamps and other necessaries. A lofty fo'c'sle-head gave much accommodation for carpenters', shipwrights' and other stores. Below it, a capacious fo'c'sle served as quarters for a crew of sixteen men. Aft, the chart-room, captain's cabin and photographic dark-room formed a block leading up to the bridge, situated immediately in front of the funnel. Farther aft, behind the engine-room and below the poop deck, was the ward-room(,) a central space sixteen feet by eight feet, filled by the dining-table and surrounded by cabins with bunks for twenty persons. From the time the 'Aurora' arrived in London to her departure from Australia, she was a scene of busy activity, as alterations and replacements were necessary to fit her for future work. In the meantime, stores and gear were being assembled. Purchases were made and valuable donations received both in Europe and Australia. Many and varied were the requirements, and some idea of their great multiplicity will be gained by referring to the appendices dealing with stores, clothing and instruments.