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Home>>Oceanography>>Acoustic Release Frames

Acoustic Release Frames



In order to increase the Safe Working Load (SWL) of a standard ORT, DORT, Heavy Load DORT, P-DORT and Heavy Load Compatt 5,, Sonardyne offer a range of heavy duty release frames. The frames act as a load amplifier so that only a fraction of the mooring load passes through the acoustic release. Applications include: offshore construction, marine salvage, defence and oceanographic research.


Manufactured from high strength steel which is galvanised and painted, the release frames offer excellent corrosion resistance and are suitable for long term deployment. This can be up to three years if the acoustic release is fitted with a lithium battery pack.

Depending on the type of acoustic release being used, the SWL of the unit can be increased up to 50 tonnes. All the frames can be easily assembled in the field and in most cases, fitted without any modification to the transponder itself. Custom frames for special applications or higher load ratings are available on special request.


Technical Specifications

Feature Type 7869 Type 7969-05
Depth Rating (Dependant on ORT or DORT) 2,000 Metres or 6,000 Metres 2,000 Metres or 6,000 Metres
Safe Working Load (at 4:1 Ratio) 7.5 Tonnes 15 Tonnes
Release Load 11 Tonnes 22 Tonnes
Breaking Load 30 Tonnes 60 Tonnes
Proof Load (Note: A Proof Test Certificate available upon request) 15 Tonnes 30 Tonnes
Mechanical Construction Galvanised Steel, Power coated Galvanised Steel, Painted
Dimensions (With DORT, exc. lifting rings)(LxWxD) 864mm (34“) x 310mm (12.2“) x 145mm (5.7“)

940mm (37.0") x 670mm (26.4") x 145mm (5.7")

Weight of Frame in Air 35kg 111kg
Weight of Frame in Air (with ORT) 65kg 155kg
Specifications for 50 Tonne SWL frames available on request 8Mb Standard (Expandable to 16Mb)



  • Safe Working Loads up to 50 Tonnes
  • Heavier load frames available on request
  • Designed around proven ORT and DORT releases
  • Compact size; just over 1 metre long
  • Galvanically isolated from acoustic release to maximise corrosion resistance
  • Uses industry standard master links
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