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Dishani

Dishani

Application:

Dishani is a directional Sonobuoy and an expendable air-deployed ASW sensor system in a compact, self-contained package comprising of acoustic sensors, electronics, and mechanical assemblies and parachute. It is meant to be dropped from an aircraft (fixed / rotary wing) and after entering the water separate into an underwater unit and a surface radio transmitter which then relay the acoustic signals to the aircraft. A directional sonobuoy system consists of a wet end comprising of the sonobuoy and an onboard system comprising of RF transceiver capable of receiving the sensor data, signal processing subsystem & HMI unit for displaying the resultant information.

Features:

  • Deployment platform - Helicopter / Fixed Wing Aircraft
  • Sonobuoy dimensions - Standard NATO size 'A’
  • Launch altitude - 50-1000 m (for helicopter), 100 – 8000 m (for fixed wing aircraft)
  • Launch speed - 0-150 Knots (Helicopter lAS) 150 – 370 Knots (Fixed wing IAS)
  • Acoustic Sensor Selections - Shallow Omni Hydrophone (15m), Deep Omni Hydrophone (up to 300 m) or Directional Sensor (up to 300 m)
  • Operating depth - Preset selectable four depth settings (30m, 60m, 120m, 300m)
  • Operating life - Selectable (0.5, 1, 2, 4, 8) hours
  • Electronic Feature Select (EFS) - Operating Depth, RF Channel, Operating Life, Acoustic Sensor, Pre amplifier Gain, Scuttle
  • Command Feature Select (CFS) - RF Channel, Operating Life, Acoustic Sensor, Pre amplifier Gain, Scuttle
  • Command Feature Select (CFS) - UHF – single channel at 291.4 MHz
  • Sonobuoy Selection - Individual addressing (24 bit)
  • Sonobuoy Data telemetry band - VHF (136.000 to 173.500 MHz) 100 channels selectable
  • Sonobuoy Location Information - Equipped with GPS for own location / reconfigurable to NAVIC in future
  • Weight - 9 Kg Approx.
  • Shelf Life - 5 years in sealed container