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Saab AUV62-AT (ACOUSTIC TARGET)
 

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SYSTEM OVERVIEW

The AUV62-AT system is intended for ASW operator training, as well as for on board sonar, helicopter sonar and command system check-up. The system also plays an important part in the capability evaluation of an entire ASW force.

The AUV62-AT is an artificial acoustic target that mimics a submarine in a way that is compatible with any torpedo and sonar system on the market, today and in the future.

The AUV62-AT system replaces the use of a submarine in the role of a manoeuvring training target. The vehicle transmits broadband noise similar to the passive signatures of a conventional submarine. It also echoes back received active sonar pings received with a realistic target strength and echo elongation.

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THE AUV62-AT SYSTEM

The complete AUV62-AT system consists of a vehicle, a command/control system and all ancillary systems required to operate and maintain the system. The command and control system includes a PC based operator console which isused for mission planning, mission control and mission evaluation.

The AUV62-AT System consists of:

  • AUV62 Vehicle
  • Signal Generation and Analysis System
  • Mission Planning System
  • Mission Evaluation System
  • Launch & Recovery System (LARS)
  • ILS Package
 
 
 


TYPICAL MISSION

An ASW-mission for the AUV62-AT system can typically include the following steps:

  1. Mission planning.
  2. Launch.
  3. Transit to the mission area (normally submerged).
  4. Execution of the pre-progranuned mission with pre-defined signatures and behaviours.*
  5. Transit to the recovery point (rendezvous).
  6. Recovery.
  7. Evaluation of recorded exercise data.
  8. Preparation of a report and going through the ASW exercise evaluation.

* During a mission or transit the AUV62-AT can at any time be ordered to the surface so that a new mission can be downloaded.


TECHNICAL DATA

Specification
Diameter 21" (0.533 m)
Weight 650 kg
Speed 0 - 12 knots
Operation depth 0 - 300 m
Battery 12 kWH LiPo
Endurance (Active Operation) 21h @ 3 knots
Endurance (Passive Operation) 18h @ 3 knots
Endurance (Mixed Operation) 16h @ 3 knots
Noise Programmable
Passive signature 10 Hz - 100 Hz, 130 dB
100 Hz - 300 Hz, 150 dB
300 Hz - 100 kHz, 155 dB
Echo repeater Programmable
Target strength -10 - +22 dB
Output > 185 dB (rel. 1 Pa 1m)
Freq. response 2.5 kHz - 100kHz
Dynamic range 90 dB (standard tail)
 

 


SIGNATURE GENERATION

The signature generation system is fully digitized and software controlled, which gives great flexibility for future development and adaptation to new functionality.

The AUV62-AT signature generation system provides two basic functions: passive signature generation and active signature generation. In passive operation, the system generates a userdefined submarine-like signature composed of broadband noise with a spectral slope, noise modulation and a number of added tonal components. The signal processing system enables the emitted noise to be automatically adjusted to match the expected signatures at different speeds. In active operation, received pings are processed and echoed back. For each ping. the signal processing comprises elongation, addition ofhighlights and amplification of the signal in accordance with a pre-programmed Target Strength. The echo is thereafter transmitted after a pre-defined delay using gated transmission. All raw data from hydrophones and other sensors as well as results from internal recalculations are recorded during the complete mission, allowing comprehensive evaluation and post-processing. All results and raw data are downloaded from the vehicle before any evaluation or post-processing is carried out.

The echo is thereafter transmitted after a predefined delay using gated transmission.

All raw data from hydrophones and other sensors as well as results from internal recalculations are recording during the complete mission, allowing comprehensive evaluation and post-processing. All results and raw data are downloaded from the vehicle before any evaluation or post-processing is carried out.

 
 


OPTIONS

  • Retractable Mast
  • Ballast Tanks
  • Advanced Tail
  • Surface Communication
  • Underwater Communication
  • Gateway Buoy

 
 
 
 
 
 
 
 
 




LAUNCH & RECOVERY

The AUV62-AT vehicle can be launched from a wide range of platforms at sea or from the shore. For surface ship launch and recovery, a specially designed docking device launches and retrieves the vehicle in the water.

The AUV62-MR vehicle is normally recovered in the same way it is launched. However it can be recovered by other means, regardless of how it is launched.

On completion of recovery, the turnaround time to re-launch the vehicle for the next mission is normally 4 hours for a total recharge cycle. Without total recharge, the turnaround time is cut to approximately 30 minutes.

SPECIFICATIONS MAY CHANGE WITHOUT PRIOR NOTICE