Kongsberg Simrad SPT 319 Transponder

Available as:
  • Rental
  • Sale (ex rental)

Kongsberg Simrad SPT 319 Transponder – Available for rental, hire and ex-rental purchase from Ashtead Technology.

The medium frequency Kongsberg Simrad SPT 319 transponder has 56 channels for use with the HPR series and the HiPAP systems. This transponder replies with a single or a multipulse response. This reply contains different information to the HPR or HiPAP systems depending on the current application.

The transponder consists of the following main components: Transducer head, Battery, Electronics, Housing. The transponders are supplied with different transducer heads. The last digit in the model number identifies the + width of the beam pattern. The electronics with software is modular with all the models. The housing length is defined by the transponder model.

SPT The SSBL Positioning Transponder (SPT) can only operate in Super Short Base Line. However, the SPT also supports telemetry capabilities and functionality

Capability The SPT transponders are not only compatible for use with the HPR 400 series and HiPAP systems. They can also be used by the HPR 309/310, and former models with the original 14 channels. The channel is preset from factory, but can be altered by adjusting internal switches, or by acoustic telemetry from the HPR 400 series and HiPAP systems. HPR 309/310 and former systems cannot send telemetry for this purpose.

Special Facilities The acoustic telemetry link may be used to: Set the transponder into different modes of operation Transfer data from the transponder Set the transponder receiver sensitivity and transmitter power level. This is used to achieve optimal performance and battery lifetime Read remaining battery lifetime Change the pulse length and turnaround delay

Mounting and Handling The transponder may be secured to a subsea structure using mounting brackets, or fitted with an anchor weight and buoyancy collar for location on the open seabed. The unit is designed for ROV manipulator handling.

Power Supply All models are normally self contained with power supply. A lithium battery is used to ensure long life. As an option, a transponder may be externally powered. A rechargeable battery with battery charger is available. The rechargeable battery pack may be used as a replacement for the standard transponder battery, L10/36.

Housing Material The housing material is anodised aluminium with polyurethane coating.

Naming Principles The transponder name contains three letters followed by three digits, and the letters after the digits describes the options. SPT = SSBL Positioning Transponder 3xx = 30khz band x1x = depth rated for 1000 meters xx9 = +90° beamwidth


  • Dynamic position reference for surface vessels.
  • Navigation of underwater vehicles and towed bodies.
  • Positioning aid for pipeline and underwater structure maintenance and construction.
  • Positioning and re-entry of BOP s.
  • Riser angle and BOP angle monitoring.
  • Telemetry of inclinometers, acoustic release or external sensors.
  • Sensor-reading telemetry transponder.

Technical specifications

Depth Rating1000 m
Housing MaterialAluminium
Transducer Beam width±90° or ±45°
Source Level±90°, 4 steps: max 188 dB relative to 1µPa. Ref. 1m +45°, 4 steps: max 195 dB relative to 1µPa. Ref. 1m Rx sensitivity, 2 steps: Max 100 dB relative to 1 µPa.
Frequency BandsTx 24.5 32.5 kHz Rx 20.0 27.0 kHz


Housing131 mm5.15
Clamping Ring171 mm6.7
Overall Length1255 mm49.4
Housing Weight in air24kg53 lbs
Housing Weight in Water10kg22 lbs