Product Profile of Hull Mounted Variable Depth Sonar Hus 002

Bharat Electronics manufactures Hull Mounted Variable Depth Sonar. The product Hull Mounted Variable Depth Sonar is a dual array system which comes with two transducer arrays. One transducer in the Hull Mounted Variable Depth Sonar is an array for fixed depth operation and the second for variable depth operation. Hull Mounted Variable Depth Sonar has simultaneous active and passive reception facility. Enhanced system reliability is achieved by having single transmitting and receiving electronics for both arrays. During one echo ranging cycle, only one array can be employed. Hull Mounted Variable Depth Sonar Comprises of: HM [Hull mounted] transducer array with associated handling gear, VD [Variable Depth] transducer array with associated fish handling gear, Power Supplies, Transmitter, Receiver, Display and Controllers. The salient features of the Hull Mounted Variable Depth Sonar:

• A dual array medium range sonar system.

• Dual frequency of operation

• Capable of simultaneous active/passive panoramic search / track

• Capable of tracking two targets simultaneously in active mode and one target in passive mode

• Semi-automatic active tracking and fully automatic passive tracking

• A microprocessor based monitoring system

• Memory aided raster scan display system
Technical Specifications

• Dual array option

• Simultaneous active and passive Surveillance

• Simultaneous search and track

• Classification of echoes
FREQUENCIES Active channel Centering around 6.0 to 7.5 kHz Passive channel Broad spectrum of 4 kHz Range scale 4,8,16,32 km with provision for variable Flyback in 8,16 and 32 km DISPLAY RESOLUTION Range 7.8 m [at lowest range scale] Bearing 1.4° TRANSMITTER Arrays Hull mounted [HM] Variable depth [VD] Interlaced [HM-VD] Modes Dual contra-rotating directional transmission [DRDT] Sector contra-rotating transmission [SRDT] Single directional transmission [SDT] OMNI transmission OMNI/RDT interlaced transmission [ORDT] Waveform 5 ms CW, 40 ms CW, 40 ms LFM, 160 ms SFM, 160 ms CW Beam width of hull mounted array Horizontal 12° ± 1°, Vertical 9° ± 1° Beam width of variable depth array Horizontal 12° ± 1°, Vertical 9° ± 1° Output Power 32 kW [peak] Source level OMNI at 122 ± 2 dB ref 1 micro bar Other modes 132 ± 2 dB ref 1 micro bar Power selection Operator can select source level at 0 dB 6 dB manually OFF. In manual mode in steps of 1 dB from 0 to 63 dB Own Doppler correction Own ship`s speed upto 32 knots RECEIVER Bandwidth of pre-amplifier Wide band Number of input channels 32 each for HM and VD array Number of beams 32 full beams and 64 half beams for both active and passive channels. Beam spacing 11.25° Beam width Horizontal 12° ± 1°, Vertical 9° ± 1° Beam former type Tap out LC delay line followed by raised cosine shading and summing Active search Post detection pulse compression [PDPC] Polarity coincidence correlator [PCC] Bandwidth ± 300 Hz ODN ± 32 knots Active track processor Semi-automatic Bearing resolution 1.4° Doppler resolution 1.0 knot Track range display 480 / 960 metres Target Doppler ± 32 knots Passive search processor Short term average [STA] 160 ms Long term average [LTA] 2560 ms Despoke suppression 10.24 second & 40.96 second [ELCA] Passive track processor Automatic tracking of HE SNR required ±3dB Audio processor Aural indication for both Active and Passive channels Classifier processor Aids target classifications by bringing out highlights of the target [A-scan format] Display Display type Raster scan display, Control through key pad and some dedicated switches Special feature Refreshed memory display [refresh rate 50 Hz] Facility for multiplying history [8 layers] Display of essential information along with echo ranging scan [alphanumeric] Special facilities Recording facility for Audio and Video data processor based fault detection and fault localization facility Inbuilt test-target and sea noise generation to evaluate the FOM of the system external system interface to interface with ships systems HM array No.Of staves 32 Elements / stave 9 VD/array No.Of staves 32 Elements / stave 9 POWER SUPPLY 440 V, 60 Hz, 3 phase 115 V, 400 Hz, single phase Dimensions/Weight Each cabinet [H] 1178 x [W] 584 x[D] 641 mm/200 kg [With drawers closed] [H] 1178 x [W] 584 x[D]1184 mm/200 kg [With drawers fully open] HM array [H] 1229 x [D] 1220 mm VD array [H] 890 x [D] 1220 mm