Lightweight Actuation Transponders


Part of Sonardyne’s Coastal Acoustic product range, the Type 8044 LAT is a low cost acoustic device that provides cable-less, through water control of underwater electrical equipment. Applications for the LAT include activating the inflation of buoyancy bags and opening or closing valves.

The LAT can also be interrogated from the surface to determine its position on the seabed and provide confirmation of electrical activation.

The output from the LAT can be configured to provide multi-width and multi-pulse electrical outputs to suit a wide range of requirements. A rugged underwater connector ensures reliable activation.

The LAT is remotely controlled from the surface using a low-cost deck unit supplied with a dunking transducer and 10 metres of cable. The deck unit is used to program the acoustic identity of the LAT from several thousand available and then test the unit prior to deployment. Once in the water, the deck unit can measure ranges to the transponder and after sending a secure actuation command, relocate the transponder.





Feature Type 8044
Depth Rating 500 metres
Operating Frequency HF (35-50kHz)
Transmit Source Level 185dB re 1µPa @1m
Number or Unique Addresses 3609 (Field Program)
Switch On Continuously Operating (No On/Off switch)
Battery Life Alkaline
Long Life Lithium
18 months
34 months
52 months
Max Actuation Current 120mA increasing with shorter pulse widths (Higher currents available)
Actuation Pulse Voltage 10-15V DC
Actuation Pulse Width 2 Second typical (other options available upon request)
Actuation Pulses Per Command 1 Typical (other options available upon request)
Total Number of Actuations <100,000 (2 seconds @ 1mA)
Connector Type 8 way Sub con MCBH8FAL/2-0 Bulkhead Female
Mechanical Construction Plastic/ S/Steel / Aluminum Alloy (Anodised)
Dimensions (LxDia) 63mm (2.4”) x 490mm (19.3”)
Weight in Air 1.7kg
Weight in Water 0.4kg
Deck Unit Type 7967-000-02 (Includes Transducer and 10 metres of cable)