TZT is a vessel-based acoustic transceiver that's used as part of our Transition Zone / Ocean Bottom Cable (TZ/OBC) acoustic positioning system. Use it with TZ/OBC or SST 6 transponders.
At a glance
Accurately positions your Sonardyne MF or HF seismic node and ocean bottom cable-mounted transponders
Provides high-accuracy positioning right into the surf zone; <1 m water depth
Designed for small work boats, RHIBS and USVs working in parallel with your node laying vessel
Choice of frequencies depending on your transponder inventory; HF for Type 7815s or MF for SST 6s
Suitable for
For shallow water surveys
Want to find out more
Overview
TZT is compact, simple to fit and easy to operate, making it the ideal choice for shallow-draft workboats, RHIBs and uncrewed surface vessels (USVs). Onboard, the splashproof (normally surface-mounted) transceiver electronics module is cabled connected to your PC equipped with our HydroPos software (or third-party software) and remote acoustic transducer.
The remote transducer is normally attached to a rigid pole and deployed over the side of the craft you’re using. A GNSS receiver is typically attached to the top of the pole but, aside from that, there’s no need for any other ancillary equipment, such as a gyro or attitude and reference system, and the complexities that integrating them would involve.
On command from your PC, the TZ Transceiver acoustically interrogates up to nine TZ/OBC transponder or up to 95 SST 6 transponders at a time and the acoustic responses are used to generate range measurements to each of them.
By combining the many acoustic range measurements made to each transponder, with GNSS data input into HydroPos, it is possible to generate accurate positions of all transponders to better than 1 m absolute precision.
Mounting TZT onto a USV unlocks the opportunity to reduce the risk, cost and environmental impact of your surveys by reducing the number of crewed vessels required to support your survey.
Resources
| Feature | Type 8263-010-0021 | Type 8263-010-0022 |
|---|---|---|
| Operating Frequency | HF (35–50 kHz) | MF (20–34 kHz) |
| Transmit Source Level (dB re 1 µPa @ 1 m) | >184–186 dB | >184-187 dB |
| Receive Sensitivity (dB re 1 µPa) | <90 dB | <90 dB |
| Ranging Precision | Better than 0.5 m | Better than 15 mm |
| Addresses | 401 | 1520 |
| Power | 28 V dc, maximum 2 A | 28 V dc, maximum 2 A |
| Communications | RS232/RS485 @ 9,600 to 115,200 baud, Ethernet | RS232/RS485 @ 9,600 to 115,200 baud, Ethernet |
| Mechanical Construction | Aluminium alloy | Aluminium alloy |
| Operating Temperature | -5 to +50°C | -5 to +50°C |
| Storage Temperature | -20 to +70°C | -20 to +70°C |
| Dimensions (Length x Width x Height) | 223 x 220 x 91 mm | 223 x 220 x 91 mm |
| Weight | 3 kg | 3 kg |
| Feature | Remote Transducer HF | Remote Transducer MF |
| Operating Frequency | HF (35–50 kHz) | MF (20–34 kHz) |
| Depth Rating (Acoustic Transducer) | 100 m | 100 m |
| Cable Length | 20 m | 20 m |
| Mechanical Construction | Stainless steel | Stainless steel |
| Dimensions (Diameter x Length) | 90 x 211 mm (without cable) | 90 x 211 mm (without cable) |
| Weight in Air | 3.7 kg (without cable) | 3.7 kg (without cable) |
