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Small Seismic Transponder 6

Engineered for: Seabed

SST 6 is a small rugged transponder for acoustic positioning of ocean bottom seismic cables and nodes, where high-performance, small-size, low-cost and ease of programming are all important operational factors.

At a glance

Accurately positions seismic cables and nodes in water depths to 3,000 m

Designed on 6G hardware and Wideband 2 technology platforms

Compatible with Mini-Ranger and Ranger 2 USBL positioning systems

Choice of depth ratings; 1,000 m or 3,000 m

Over 1520 unique acoustic transponder addresses supports large surveys

Automated programming using NFC link without human intervention

Small in size, big in performance

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SST 6 is a small rugged transponder designed to acoustically position of ocean bottom seismic cables and nodes, where high-performance, small-size, low cost and ease of programming are all important operational factors.

SST 6 incorporates our Wideband 2 digital acoustic signal processing architecture to deliver substantial performance gains over the previous generation SST and ensures robust positioning performance in the most challenging of operational environments.

Innovations such as built-in, Near Field Communications (NFC) technology allows SST 6 transponders to be checked and programmed without human intervention, supporting operators’ vision for fully automated node handling and efficient back-deck Ocean Bottom Seismic (OBS) operations.

SST 6 operates in the Medium Frequency (MF) band and is compatible with our Mini and Ranger 2 USBL systems. Ranger 2 USBL systems measure both range and bearing to SST 6 in the same operation so an accurate position of the node or cable can be determined very quickly and at a high update rate.

Combining the use of Ranger 2 USBL and SST 6 in this way results in considerable savings in vessel time and new standards of efficiency for seismic operations.

The SST 6 incorporates Near Field Communications (NFC) allowing fast programming of 16 group interrogation addresses and 95 reply channels providing more than 1520 unique acoustic identities.

This allows the marking of seismic cables and other applications demanding dense transponder coverage. SST 6 is configured using NFC with a suitable NFC enabled handset (including an NFC enabled Android™ handset with the Sonardyne NFC App) or a dedicated HF Radio Frequency Identification (RFID) reader.

The NFC link provides the ability to enter SST 6 into a storage mode when not in use, thereby significantly increasing the overall battery endurance.


Feature Type 8325-1111 Type 8325-3311
Depth Rating 1,000 m 3,000 m
Operating Frequency MF (19–34 kHz) MF (19–34 kHz)
Transmit Source Level (re 1 µPa @ 1 m) 187 dB 187 dB
Battery Life 9.5 Months Battery Life
Operating Temperature -5 to 40°C -5 to 40°C
Storage Temperature -20 to 55°C -20 to 55°C
Dimensions (Length x Diameter) 385 x 63 mm 385 x 63 mm
Weight in Air/Water 1.0/0.3 kg 2.0/1.3 kg

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Small in size, big in performance