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Barra SSQ - 801 Sonobuoy used for submarine detection tracking and identification

Date: 1981 - 1991
Dimensions:
Overall: 920 x 129 mm, 9.2 kg
Medium: Metal, plastic
Credit Line: ANMM Collection Gift from Sonobuoys Australia
Classification:Vessels and fittings
Object Name: Sonobuoy
Object No: 00017130
Place Manufactured:Australia

User Terms

    HistoryJane's Underwater Warfare Systems 1998/1999
    AN/SSQ-801 B Barra sonobuoy
    Type: passive directional sonobuoy
    The new Barra sonobuoy design is the end result of two years development by GEC Marconi (now Thomson Marconi) and RAAF and RAN. The complexity and cost of the 'AN/SSQ-801 A' prohibited extensive improvement of performance. It was in
    service with the RAN since 1981. The B version has been in service since December 1996. It was designed for rapid and accurate localisation of submarine targets. The buoys performance is achieved by beam-forming the output of 25 hydrophones in a horizontal plan array which provides a highly selective steered gain in the direction of the targets, and suppression of noise interference. All hydrophone and compass data is transmitted by a FSK(frequency shift keying) VHF transmitter. Can be launched from fixed wing aircraft or helicopters. A parachute is automatically
    deployed to slow down the decent and stabilise the trajectory. Upon water entry the depth selection mechanism is activated, the parachute jettisoned and the unit automatically deploys. Fully operational within 65 second softwater impact. Five hours from water impact, the unit automatically scuttles. The RF transmits when it surfaces.
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