Imenco Equipment
Diver Emergency Through Water Communication System ETWC
Acoustic emergency voice communication between surface vessel and diving bell, operating to 610m (2000 feet) with 20 watts acoustic power.
Description
Imenco Nautronix ETWC systems provide long-range emergency through-water voice communication between a surface vessel and a diving bell if wired links are lost. They can also be used in manned submersibles. A system comprises a 3136C surface unit and a 3133B bell unit, each with a hemispherical beam pattern and battery back-up.
Key features
- Half-duplex voice communication at depths of 610 m (2000 feet)
- Proven to operate in a State 6 sea
- Acoustic power 20 watts; source level 183.7 dB ref. 1 micro Pascal at 1 m + 3 dB
- Bandwidth approximately 3 kHz
- Surface unit: 4U 19-inch rack unit powered by 24 V, operating time in the order of 15 hours (10% transmit / 90% listen)
- Bell unit designed for diving bell atmosphere to 610 m, 24 Vdc supply
Specifications
| Operating depth | 610m (2000 feet) |
|---|---|
| Acoustic power | 20 watts |
| Source level | 183.7 dB ref. 1 micro Pascal at 1 metre + 3 dB |
| Bandwidth | approximate 3 kHz |
| Power supply | 24 Vdc |
| Surface unit operating time | in the order of 15 hours (10% transmit / 90% listen) |
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