Checkout this Russian arms export agency (Rosoboronexport) advertisement for normally Top Secret SOSUS (undersea sound surveillance system) equipment.
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Why might Russia broadcast the sale and characteristics (below) of “Sever-E” SOSUS so openly? No other country-company advertises SOSUS equipment for sale - to my knowledge.
See Sever-E's description and graphics on the Rosoboronexport website http://roe.ru/eng/catalog/naval-systems/stationary-electronic-systems/sever-e/ below:
"Sever-E
Static sonar system
Mission
The Sever-E static passive sonar system is designed to surveillance undersea situation for search surface and underwater objects at vast areas, low-noise submarines essentially.
Features
- search and detection of submarines, surface ships by their sonar fields, with the determination of their coordinates;
- tracking of the detected targets, computation of their parameters (heading, speed, movement pattern);
- classification of the tracking targets by their noise signatures;
- automated transmitting tactical situation data processed for Task Force targeting by means different communication channels, satellite including.
· Capabilities
The Sever-E system is capable of detecting ships and low-noise submarines, being deployed along an up to 1,000 km long borderline, at a deep of up to 200 km off-shore and placed at seabed at an up to 1,000 m depth. Coverage zones – 30-30,000 sq. km. Thanks to high reliability of its components the system can operate continuously for 10 years without the need for retrieving the bottom equipment.
Main characteristics
Sonar arrays | 8-60 |
Underwater coverage area (for objects with 0.05-0.1 Pa noise), sq.km | 1-9 |
Surface coverage area (for objects with 0.05-5 Pa noise), sq.km | 30-300 |
Coastal equipment area, sq.m | 20-30 |
Shift crew | 2-4 |
Power consumption, kW | 2-4 |
Service life, years | 10 |
Graphics
[What looks like a passive (green hydrophone) and white cables (to carry the 2-4 kW electical power and fibre optic portion for data)]
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[Electronic/computer sound signal intercept display equipment for the 2 to 4 crew members (working on 6 hour or 12 hour shifts?)]
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[Illustralion how 3 green Sever-E hydrophones detect and triangulate a submarine approaching the Sever-E SOSUS line-array. Something that may happen to Western submarines when they presume their approaches to Russian Northern Fleet and Pacific Fleet bases are "undetected".]"