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ORTs and DORTs are controlled using a frequency band specific Lightweight Command Unit (LCU) which consists of an over-the-side dunking transducer connected either to a splash-proof handheld terminal or, via supplied software, to any PC. The Type 7663 unit is a Medium Frequency LCU for commanding ORTs whilst the Type 7667 LCU is a Low Frequency unit suitable for use with DORTs
For security of operation, a special coding system provides protection against accidental release by noise or acoustic transmissions from other equipment. Each ORT or DORT has its own unique ‘address’ enabling a number of units to be deployed in the same area without risk of interference.
| Feature | Type 7663 | Type 7667 |
|---|---|---|
| Operating Frequency | MF (18–36kHz) | LF (7.5–15kHz) |
| Transducer Beamshape | Hemispherical | Hemispherical |
| Transmit Source Level (dB re 1µPa @1m) | 186dB | 188dB |
| Receive Threshold (dB re 1µPa) | <115dB | <115 |
| Battery Life (Ni-Cad, Rechargeable) | 4-8 Hours (Continuous Interrogation) | 4-8 Hours (Continuous Interrogation) |
| Battery Shelf Life (Disconnected) | 2 Months | 2 Months |
| Transducer Cable Length | 40 metres | 40 metres |
| Transducer Weight in Air (Excluding Cable ) | 8kg | 8kg |
| Transducer Weight in Water (Excluding Cable) | 3kg | 3kg |
| Shipping Weight | 40kg | 40kg |
| Freeware | |
|---|---|
| LCU PC Utilities | More details |
| Instrument Firmware | |
|---|---|
| LCU MF | V4.04 |
| LCU LF | V4.04 |