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Command Transmitter

Technical Information

Catalogue No: C0887
Category: Surveillance/Acoustics
Object Type: Signal/Data Processor
Object Name: Command Transmitter
Part No: AA34030-2X
Serial No: 806784
Manufacturer: GEC Avionics
Division: Unknown
Platform(s): Merlin AW101 (EH101)
Year of Manufacture: Unknown
Dimensions: Width (mm): 124
Height (mm): 193
Depth (mm): 253
Weight (g): 5,560
Location: Rack RAA04 [Main Store]

GEC Avionics Limited BS8
Basildon, England
Command Transmitter
Instr. No. 806784
Compass Safe Distance 30cm.
Wt. 5.8 kg
Made in England


This is a Command Transmitter for the AQS903 system fitted to the EH101 Merlin.

The AQS-903/AQS-903A are powerful lightweight acoustic processors for helicopter and fixed-wing applications. These systems can process data from eight to 32 sonobuoys in any combination. This flexibility is derived from the design based around a number of processing 'pipelines', each able to handle a certain quantity of passive and/or active sonobuoys. Four of these pipelines provide a processing power eight times that of the earlier generation AQS-901, at a fraction of the size and weight.

AQS-903/903A series make extensive use of distributed processing, with the systems incorporating the latest component technology to provide the operator with a wealth of information. The system provides a wide range of processing options to enable the operator to smoothly progress from initial contact detection to classification, localisation and tracking to achieve an effective mission. Analysis and display cues are in plain language, requiring a minimum of operator training. The system can process data from LOFAR, DIFAR, HIDAR, Barra, DICASS and CAMBS buoys.

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