Sonardyne - Delivering trusted solutions for acoustic positioning, inertial navigation, wireless communications, sonar imaging
- Overview
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- Features & Benefits
- Safe Working Load of 2.5 Tonnes
- 7,000 Metre depth rated
- Highly reliable, proven release mechanism
- Up to 9 years deployment with extra long life lithium battery
- Excellent corrosion resistance - Ferralium 255
- Compact and rugged design
- Mechanically compatible with other release transponders
- Choice of housing lengths to suit deployment scenario
- Datasheet
- Heavy Load DORT
The Type 8048 Heavy Load DORT (Deep Oceanographic Release Transponder) is a tough, reliable acoustic release designed for deployment in up to 7,000 metres of water.
Standard features include a Safe Working Load of 2,500kg and a spring-assisted release mechanism. This type of release mechanism was originally developed by Sonardyne for navigation transponders supplied to the offshore industry of which there are now many thousands reliably in service around the world.
Excellent corrosion resistance is achieved by using Super Duplex stainless steel, Ferralium 255. In addition, the Heavy Load DORT is available in different housing lengths and is mechanically compatible with other standard release transponders on the market thus simplifying mechanical integration.
Heavy Load DORTs are controlled using frequency band specific Lightweight Command Units (LCU) which comprise of a dunking transducer connected to either a splash-proof PSION, PC running supplied software or terminal program. For security of operation, a special coding system provides protection against accidental release by noise and acoustic transmissions from other vessels.
- Specifications
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Feature Type 8048 Depth Rating 7,000 metres Operating Frequency LF (7.5–15kHz) Transducer Beamshape Hemispherical Transmit Source Level (dB re 1µPa @1m) 190dB Alkaline, 184dB Lithium Receive Threshold (dB re 1µPa) 85dB Safe Working Load (4:1) 2,500kg Max Safe Release Load 2,500kg Breaking Load 10,000kg Battery Life (Listening) Alkaline
9 monthsLithium
24 monthsLong-life Lithium
36 monthsExtra Long-life Lithium
108 monthsShelf Life (Battery Disconnected)
Stored at 25ºCAlkaline
24 monthsLithium
84 monthsLong-life Lithium
120 monthsExtra Long-life Lithium
-Mechanical Construction Ferralium 255 Dimensions (LxDia) Standard Housing
Short Housing832mm (32.75”) x 145mm (5.7”)
693mm (27.3”) x 145mm (5.7”)Weight in Air Standard Housing
Short Housing37kg
32kgWeight in Water Standard Housing
Short Housing27kg
24kgDeck Unit Type 7667 LF Lightweight Command Unit
Safe Working Load - The maximum recommended working load. This is set as a quarter (1/4) of the Breaking Load and allows for factors such as corrosion, fatigue, shock loads, harmonic loads, manufacturing defects and material defects.
Release Load - The maximum in-line load that the whole assembly can release whilst guaranteeing safe and reliable operation. Note that as the load is released in water, this is determined by the maximum upthrust from the buoyancy.
Breaking Load - The load that induces structural failure in one or more parts of the instrument causing the load to part from the release mechanism. - Related Products
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