sonardyne uk (head office) t. +44 (0) 1252 872288 f. +44 (0) 1252 876100 e. sales@sonardyne.com www.sonardyne.com datasheet heavy load dort acoustic release transponder description 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 tran sponders supplied to the offshore industry of which there are now many thousands reliably in service around the world. excellent corrosio n resistance is achieved by using super duplex stainless steel, ferralium 255. in addition, the heavy load dort is available in differ ent 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. key features ? safe working load of 2? tonnes ? 7,000 metre depth rated ? highly reliable, proven release mechanism ? up to 3 years deployment ? excellent corrosion resistance - ferralium 255 ? compact and rugged design ? mechanically compatible with other release transponders ? choice of housing lengths to suit deployment scenario
sonardyne uk (head office) t. +44 (0) 1252 872288 f. +44 (0) 1252 876100 e. sales@sonardyne.com www.sonardyne.com specifications subject to change without notice - 10/2006 specifications heavy load dort acoustic release transponder feature type 8048-000-01/02 depth rating 7,000 metres operating frequency lf (7.5?15khz) transducer beamshape hemispherical transmit source level (db re 1pa @1m) 190db alkaline, 184db lithium receive threshold (db re 1pa) 85db safe working load (4:1) 2,500kg max safe release load 2,500kg breaking load 10,000kg battery life (listening) alkaline 9 months lithium 24 months long-life lithium 36 months shelf life (battery disconnected) stored at 25 o c alkaline 24 months lithium 84 months long-life lithium 120 months mechanical construction ferralium 255 dimensions (lxdia) standard housing short housing 832mm (32.75?) x 145mm (5.7?) 693mm (27.3?) x 145mm (5.7?) weight in air standard housing short housing 37kg 32kg weight in water standard housing short housing 27kg 24kg deck unit type 7667 lf lightweight command unit definitions safe working load - the maximum recommended working load. this is set as a quarter (1/4) of the breaking load and makes an allowance for factors such as corrosion, fatigue and dynamic loads. 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 when used in a mooring operation. 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.
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