At first sight, it would seem that the advantages of alternating current disappear on board ship since the main advantage—that of more economical power transmission for long distances—does not hold here. However, the electrical installation of a battleship is such a complicated problem that it finds no parallel elsewhere, and it has to be considered in detail to determine which system is the better. In order to do this it will be necessary to enumerate the electrical appliances used on board ship, and also to consider the wiring of the ship.
The following list comprises most of the electrical appliances to be found on one of our new battleships:
4 300 K. W. generating sets.
2 500 watt motor generator sets for interior communication; voltage 16 to 20.
2 500 watt motor generator sets for telephones; voltage 16 to 20.
2 25 watt dynamo motors for telephone bells; voltage 75. frequency 16 2/3.
2 1 ½ K. W. motor generator sets for turret danger zone signals; voltage 125, frequency 60.
2 Small motor generator sets for turret tell-tale system; voltage 20.
1 Small motor or motor generator set for the howlers.