RJE International Device / Instrument
ATT-400 Acoustic Target Transponder
Compact 1,000 m rated acoustic transponder giving range and bearing up to 750 m when interrogated; long-life ATT-400EL deploys up to 18 months.
Description
The ATT-400 is a small, easy-to-deploy underwater acoustic transponder rated to 1,000 m. When interrogated by STI-350, DTI-300 or VADR receivers it provides range and bearing up to 750 m, and it can also operate as a free-running pinger with an 1,800 m range.
Key features
- Receive frequency 26 kHz; transmit frequencies 27 to 34 kHz in 1 kHz steps
- Acoustic output 180 dB
- Range 750 m (transponder) or 1,800 m (pinger)
- ATT-400: up to 6 months on two 9 V batteries; ATT-400EL: six 9 V batteries for up to 18 months in transponder mode
- Aluminum housing; depth rating 3,280 ft (1,000 m)
Applications
Marking underwater sites, equipment and targets for later relocation by divers, boats or subsea vehicles.
Specifications
| Receive frequency | 26kHz |
|---|---|
| Transmit frequencies | 27,28,29,30,31,32,33,34kHz |
| Acoustic output | 180dB |
| Range | 750 meters (transponder); 1800 meters (pinger) |
| Operational life | 6 months (ATT-400); 18 months (ATT-400EL) |
| Depth rating | 3280ft (1000m) |
| Housing | Aluminum |
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