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THE MARINE REVIEW. May, 1919 254 verboard Discharge Suction ae Air pe /7P0r ar. apne f Discharge es Valve for Air Pipe Permarnerit Tanke Tp acme aes ca 9 re ass 1 . oO; C52 SS ee cae baal oT S aL a -h-----~ - Bilge SUCTIONS t oe "Discha, -- Aermanent walk Gnd Lote Se it Overboard 1 ¥ 1 + vt 1 1 x t About 1/-7$* COS. ===a SES Ses eS ers -- About 7g ------ 6+2'--_= Fresh Water PUITID 9-03" /o' Discharge ro Q// Tariks \: 7' SUCtion from Q// Tapes MIDSHIP SECTION LOOKING AFT WITH difficult to move about on the sloping deck. The following morning, it was again snowing and it took all the morning to thaw some of the valves which had become frozen. It did not seem wise to continue the work fur- ther under these handicaps. and so it - was decided to pump out all the tanks and tie up until spring. A few words as to the methods em- ployed in cutting in two the ship, may serve to dispel the idea held in some quarters, that a ship so cut is weak- ened, and can never be as strong as before she is cut. The cutting is done in a drydock. Heavy 6x6-inch angle frames having one flange punched for %-inch rivets and the other drilled for 2-inch bolts are bolted back to back and put in place against the shell at some point where there are a few shell butts. The rivets are cut out of these butts and the angles riveted to them. Then the shell plates which pass the cut are removed and patch plates which will hold the angle frames securely are riveted in place. _Evety fore and aft member which passes a cut, is removed intact, to be replaced later. The effect of this is BULKHEADS PARTLY CUT TO SHOW GENERAL ARRANGEMENT OF THE BALLAST SYSTEM to make the actual cut, step back and forth, according to the disposition of the butts; at the same time the cutting frame forms a square end and a per- fectly smooth cut. As it remains bolted together until all the patch plates are riveted, and all the other plates removed, it can be easily seen, that when the 2-inch bolts are again inserted and tightened up, that the ship will come together exactly as be- fore being cut. Then a patch plate -is removed, and the former shell plate put back in place and bolted up. One by one the old plates are replaced in this way and the rivets driven into the old holes. It is perfectly evident then, that the ship has been restored to exactly the same condition as be- fore it was cut. Any difference, if any, would be in favor of increased Strength due to a certain amount of new material in bars and straps, and new rivets. . When this is riveted up, all around, the cutting frames are removed, leaving no trace to mark the place where the cut has been made. \ All the ships cut by the shipping board were cut in this manner and finally bolted together again while afloat, and all plates above the water line re- placed while afloat. The plates below the water line were replaced in the drydock. In the case of the Van Hiss, it is proposed to join her while afloat on her side. Both sections will be on an even keel, drawing 14 feet of water, and it should be an easy matter to bolt the two sections together. When_ this is done, all of the starboard side and three-fourths of the bottom plating can be replaced, riveted and caulked. The whole side and bottom will then be cleaned and painted. The water will then be drained out of the pontoons and tanks and the ship righted. By removing the pontoons and shifting the fixed ballast to the starboard side, and filling the starboard wing tanks, the ship can be inclined to starboard sufficiently to bring the port bilge out of the water, and the port side can then be plated and completed in the same manner as the starboard side. In. this manner, it is Proposed to rejoin this ship, without Placing her again in drydock. Die wore done on this vessel forms one of the most interesting engineer- ing feats successfully accomplished