AG (sea mine)

 AG (AG — "antenna deep-water") - Soviet antenna deep-sea mine, used to destroy enemy ships and submarines, as well as to hinder their navigation. It had two modifications-AG and AGSB. It was part of the mine armament of ships of various projects.

History

The development of domestic antenna mines designed to hit submarines in a wide range of depths was started in Ostechburo in 1926. Design work led to the appearance of the anti-submarine anchor antenna of the deep-sea mine AG, adopted for service The Soviet Navy in 1940. AG was a mine KB equipped with antenna devices. The principle of operation of the mine was as follows: after installing the mine on a given depression, two copper antennas located between the antenna buoy and the mine body (upper antenna) and the mine body and anchor (lower antenna) equalized their electrical potential in seawater. When any antenna was touched by the submarine's hull, the balance was disturbed, which led to a short circuit in the electrical circuit of the mine fuse. The length of the antennas provided an overlap of the water column of 60 m. In order to prevent the safe passage of the submarine between the upper and lower antenna, five galvanic shock caps were installed on the mine body. Due to the low strength of copper antennas compared to steel The minrep service life of antenna mines was half that of conventional anchor mines, and up to 30 kg of scarce copper was spent on the manufacture of antennas for each mine. During the period ofDuring the Great Patriotic War, the antenna fuze of the AG mine was upgraded by replacing copper antennas with steel ones that are equally strong with the minrep, and installing equipment in a single unit. The mine with the upgraded fuse was named AGSB ("deep-sea antenna with steel antennas and equipment assembled in a single unit").. Simultaneously with the AG, another antenna mine was being developed — AS ("antenna standard"), also known as AGS or KB-2. Its difference from the AG mine was the absence of an upper antenna, since it was intended for installation in shallow areas. In the upper hemisphere, the mine had five electroplating caps, which made it dangerous for surface ships.

From 1941 to October 1, 1945, 1,927 AG naval mines were delivered to the Navy.

Specifications

Total weight-1120 kg;

Length×width×height — 2162×927×1205 mm;

Charge weight-230 kg;

Minrep length-360 m;

Maximum/minimum sea depth-320 m / 12 m (without antennas, 88 m with two antennas);

Recess, largest/smallest-9.1 m / 2.4 m;

Minimum mine spacing-35 m (without antennas), 45 m (with antennas);

The maximum speed of the course when setting — 24 knots (11 when setting from a board with a height of 4-6 m);

The highest side height is 4.6 m;

The accuracy of placing a mine on a given depression is 0.6 m;

Mine buoyancy reserve — 55-65 kg;

The time of arrival of the mine in the combat position is 10-20 minutes;

The presence of anti — oral devices-the "Chaika"device;

Explosion delay-0.3 s;

Permissible current speed-up to 2 knots;

The principle of operation of the fuse — copper antennas and 5 electroplated lead caps;

Antenna length — 35 m (upper), 34 m (lower);

Average service life-up to two years;