Submarine Appliances And Their Uses
Deep Sea Diving, &c., &c.

damaged boiler rooms. 1 he remaining' two cylinders (tjoft. by 12ft.) were placed on the port side, the object of these latter being to prevent the vessel from turning over on that side after reaching the vertical position. These two pontoons were secured by wire ropes toggled at their lower ends through holes cut in the bilge keel, the length of rope being so adjusted that when the vessel came into the upright position, it was taut, thus the cylinders floating along the port side would resist any tendency to list to port. On the port side of the vessel two heavy tripods (one abreast of each mast) were erected. These were secured into angle- iron collars fitted on the outer skin-plating, with backing similar to that adopted in the case of the bollards already described. But in this case only the angle-iron collars were secured. Copyright. Photo No. 61. One of the Pontoons being sunk. I he tripod legs were not fixed, the object of this being to allow of their falling away when the vessel righted. 1 itted at the top of each tripod was a heavy casting taking a 6in. wire rope, on£ end passing to the masthead, the other end being carried to a salvage steamer anchored about 50 fathoms seaward, and moored by a 7-ton stern anchor. The wire rope was led through a large leading block on the bows of two of the salvage vessels to a 50-ton purchase, extend- ing the whole length of the deck of the salvage steamer. Heavy winches thus exerted a strong pull on the masts, utilising the tripods as a fulcrum. 280 tons of pig-iron were placed on the port, bilge-keel to assist in the righting of the vessel. As a safeguard against any tendency of I35