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Anal. of the Advantages of Changing Speed, Course

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C) The submarine is easily kept at the proper depth for the attack. (d) The torpedo is not apt to broach. RULE: If the wind is 5-6 and the sea moderately rough, it will be difficult for the submarine to fire. If she does, the torpedo will probably come from a direction parallel to the trough of the sea. REASON: From any other direction it is difficult to reach firing range without exposing the conning tower or at least a large portion of the periscope. The torpedo is apt to broach unless fired in the trough of the sea also its propellers may break the surface and give away its position.

If she does, the torpedo will probably come from a direction parallel to the trough of the sea. REASON: From any other direction it is difficult to reach firing range without exposing the conning tower or at least a large portion of the periscope. The torpedo is apt to broach unless fired in the trough of the sea also its propellers may break the surface and give away its position. 80. --For the submarine the most favorable light conditions for an attack are: (a) From the direction of a bright sun glare; (b) in clear twilight from the direction of the dark background--preferably morning twilight.

If from the leeward, it probably is a stern shot. REASON: In a light breeze the submarine will travel with the wind and sea, therefore, from windward it will use its bow tubes; from leeward, its stern tube. METHOD TO AVOID ATTACK: Keep the wind and sea abaft the beam if possible. 85. -RULE: A submarine will seldom fire a torpedo when the sea is dead calm. REASON: In a calm sea a periscope will generally be sighted before the submarine reaches firing range, and if the torpedo is fired it can be seen sufficiently early to be avoided in most cases.

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