Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. [email protected] www.sonardyne.com Datasheet Heavy Load DORT Acoustic Release Transponder Description Key Features 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. • Safe Working Load of 2½ Tonnes 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. • 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. [email protected] www.sonardyne.com Specifications Heavy Load DORT Acoustic Release Transponder Feature Depth Rating Operating Frequency Transducer Beamshape Transmit Source Level (dB re 1µPa @1m) Receive Threshold (dB re 1µPa) Safe Working Load (4:1) Max Safe Release Load Breaking Load Battery Life (Listening) Shelf Life (Battery Disconnected) Stored at 25ºC Mechanical Construction Dimensions (LxDia) Standard Housing Short Housing Weight in Air Standard Housing Short Housing Weight in Water Standard Housing Short Housing Deck 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. Type 8048-000-01/02 7,000 Metres LF (7.5–15kHz) Hemispherical 190dB Alkaline, 184dB Lithium 85dB 2,500kg 2,500kg 10,000kg Alkaline Lithium Long-life Lithium 9 months 24 months 36 months Alkaline Lithium Long-life Lithium 24 months 84 months 120 months Ferralium 255 832mm (32.75”) x 145mm (5.7”) 693mm (27.3”) x 145mm (5.7”) 37kg 32kg 27kg 24kg Type 7667 LF Lightweight Command Unit 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. Specifications subject to change without notice - 10/2006 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.