United States Naval Institute Proceedings Volume 41, No. 1
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 edition. Excerpt: ...discussed, they have not been adopted, but that practically all recent ships are provided with under-water chambers or caissons, on which the explosion of mines or torpedoes can expend themselves, and are in other ways subdivided. The only other protection against submarine attack is the mobility of the vessel herself and the use of nets. Subdivision does not protect a vessel from injury of such a nature that she would have to spend many weeks in dock after a successful attack, and hence it cannot be regarded as final. We are thus driven to the conclusion either that armoring of bottoms must become a general practice or that some entirely new means of repelling or nullifying attack must be found. Here is a problem upon which our readers might exercise their ingenuity. It is, we admit, not very promising, but we suggest as a course which does hold out some hope of success that in the first place means for discovering the position of an unseen submarine might be sought. To know the position of your enemy is to win half the battle, and if we could discover some device which would lend submarine eyes to the battleship as the aeroplane has lent super-terranean sight to the general staff, we should be on a long way to avoiding such calamities as have occurred. It is well known that all submarines are noisy and that in a submerged condition they are driven by powerful electrical machinery. We suggest that two lines of research are opened by these facts. A modification of the submarine bell apparatus now fitted to many merchant ships might be used to discover the direction in which a submarine lay, or some delicate device which would discover its position by magnetic means might be invented. The matter, of course, bristles with difficulties, ..
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