Submarine Communications And Antenna Systems Parts

(Page 6) End item NSN parts page 6 of 16
Part Number
NSN
NIIN
12111400 PIECE 26 Standardized Electronic Module
010249540
1228Z52 Cylindrical Roller Bearing
001586013
1251-3688 Electrical Plug Connector
000907257
12514G02 Headset-microphone
005012091
12901212PC6 Standardized Electronic Module
010249540
13-13-178659 Cylindrical Roller Bearing
001586013
13160922 Electrical Tiedown Mounting Base
011269065
1343 Fluid Filter Element
009407928
13499 Power Transformer
004857757
136500-7 Electrical Contact
009886652
1376-19-183 Electrical Plug Connector
007719161
14-012 Knitted Wire Mesh
004992404
14020 Semiconductor Device Assembly
011190367
144553 Cylindrical Roller Bearing
001586013
1450-0435 Indicator Light
010278932
14677 Battery Filler Cap
006763376
149-088 Lug Terminal
001776610
149-088-0001 Lug Terminal
001776610
14903 Semiconductor Device Assembly
011190367
14904 Semiconductor Device Assembly
011190367
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Submarine Communications And Antenna Systems

Picture of Submarine Communications And Antenna Systems

Communication with submarines is difficult because radio waves do not travel well through good electrical conductors like salt water.

The obvious solution is to surface and raise an antenna above the sea level, then use ordinary radio transmissions. However, a submarine is most vulnerable when on the surface. Early submarines mostly travelled on the surface, diving mainly to evade immediate threats because of their limited underwater speed and endurance. During the Cold War, however, nuclear-powered submarines were developed that could stay submerged for months. To communicate with submerged submarines several techniques are used.

Sound travels far in water, and underwater loudspeakers and hydrophones can cover quite a gap. Apparently, both the American (SOSUS) and the Russian Navy have placed sonic communication equipment in the seabed of areas frequently traveled by their submarines and connected it by underwater communications cables to their land stations. If a submarine hides near such a device, it can stay in contact with its headquarters. An underwater telephone sometimes called Gertrude is also used to communicate with submersibles.

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