Dunker 6+ is an LBL and telemetry transceiver specifically designed for vessel deployment. The super duplex stainless steel housing with shock and vibration isolated electronics makes for an extremely rugged dunking system.
At a glance
Perfect for commanding LBL transponders
Use it to recover data from Fetch and AMTs
Capability to operate as topside for RT 6 acoustic releases
Deploy it over-the-side of your vessel
Rugged mechanics and connectors
Shock mounted internal electronics
Built for LBL and data harvesting
Want to know more?
Overview
Its high power output and Wideband 3 signal processing offers improved operating range and acoustic performance in challenging conditions such as when deployed from noisy vessels or in multipath environments.
The internal Lithium-ion rechargeable battery pack minimises the supply current for long dunker cables. It also enables relocation of the dunker if the cable is cut.
The robust AGP connector on the Dunker 6+ is identical to the ROVNav 6+ and HPT USBL for compatibility and to reduce spares.
Dunker 6+ LBL and telemetry transceiver is fully compatible with our modem and sensor logging instruments such as AMT and Fetch , allowing it to be used to retrieve data or configure logging regimes. It can also be used to release the RT 6 range of acoustic releases.
The Dunker 6+ system consists of 100 m of cable on a stainless steel cable drum with brake and locking mechanism. The 10 m deck cable between the 48 V Surface Interface Unit (SIU) and the cable drum allows the drum to be conveniently located. The connection to the cable drum is via an easily replaceable 8-way SubConn.
Optionally, an RT 6 topside kit with 30 m of cable is available in a carrying case without a cable drum.
Dunker 6+ case studies
Resources
| Feature | Type 8309-1351 | Type 8309-1353 | Type 8309-1355 | Type 8309-1356 | |
|---|---|---|---|---|---|
| Depth Rating | 1,000 metres | 1,000 metres | 1,000 metres | 1,000 metres | |
| Operating Frequency | MF (20–34 kHz) | MF (20–34 kHz) | LMF (14–19 kHz) | LMF (14–19 kHz) | |
| Transducer Beam Shape | Omni-directional | Directional | Omni-directional | Directional | |
| Transmit Source Level 
(dB re 1 µPa @ 1 m) | 187–196 dB (4 levels) | 190–202 dB (4 levels) | 187–196 dB (4 levels) | 187–202 dB (4 levels) | |
| Tone Equivalent Energy (TEE)* | 193–202 dB | 196–208 dB | 193–202 dB | 193–208 dB | |
| Receiver Sensitivity (dB re 1 µPa) | 90–120 dB (7 levels) | 80–120 dB (7 levels) | 90–120 dB (7 levels) | 80–120 dB (7 levels) | |
| Range Precision | Better than 15 mm | Better than 15 mm | Better than 15 mm | Better than 15 mm | |
| Serial Communications (Software Programmable) | Primary port: RS485 (half-duplex) or RS232 Secondary port: RS485 (half-duplex) or RS232 or SYNC IN | Primary port: RS485 (half-duplex) or RS232 Secondary port: RS485 (half-duplex) or RS232 or SYNC IN | Primary port: RS485 (half-duplex) or RS232 Secondary port: RS485 (half-duplex) or RS232 or SYNC IN | Primary port: RS485 (half-duplex) or RS232 Secondary port: RS485 (half-duplex) or RS232 or SYNC IN | |
| Operating Voltage | 24 or 48 V dc (±10%) | 24 or 48 V dc (±10%) | 24 or 48 V dc (±10%) | 24 or 48 V dc (±10%) | |
| External Power | Active (listening) Peak (during transmission) | <3 W typical (max 6W when charging) <80 W | <3 W typical (max 6W when charging) <80 W | <3 W typical (max 6W when charging) <80 W | <3 W typical (max 6W when charging) <80 W |
| Battery Life Li-ion (Listening) | 3 Days | 3 Days | 3 Days | 3 Days | |
| Mechanical Construction | Super-duplex stainless steel | Super-duplex stainless steel | Super-duplex stainless steel | Super-duplex stainless steel | |
| Dimensions ; Length x Diameter | 692 x 200 mm | 660 x 200 mm | 586 x 200 mm | 641 x 230 mm | |
| Weight in Air/Water** | 24/16 kg | 26/17 kg | 20/14 kg | 28/17 kg | |
| Connector Type | AGP (8-way female) |