Design and Powering of Cable Ship 'Long Lines'

I.I Factors Affecting Ship Design The primary purpose of the new Cable Ship Long Lines was to lay a new type of cable system. Its secondary, but scarcely less important, purpose was to be capable of repairing all existing and new cable systems, both telephone and telegraph. The ship then, a tool in itself, had to carry other tools or hardware to do the job for which it was designed. First in importance were the cable tanks, the number and size depending on the amount and type of cable to be carried, then the means of payout for laying, and last the type of pickup for repair work. 1 2 Speed and range were developed when the owner specified the extent of the ship's run, its longest service steaming time, and its time 011 the so-called "cable grounds." Since the Long Lines was to be at sea for long periods of time and carry a multimillion-dollar cargo, great emphasis was put 011 the reliability of the ship and its component parts. All machinery and equipment used were designed to operate satisfactorily with a momentary roll of 30 degrees to either side or a pitch of 10 degrees, a permanent list of * All of Gibbs & Cox, Inc., New York, N.Y. 1435