Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. [email protected] www.sonardyne.com Datasheet Mini RovNav LBL Transceiver Description Mini RovNav is a compact, remote acoustic transceiver designed to accurately position deepwater, mobile targets such as ROVs and towfish. The Type 7842 is a Medium Frequency (18-36 kHz) version which gives ranges up to 3kms and a positioning accuracy of ±0.15m. The Type 7860 Extra High Frequency (50-110 kHz) Mini RovNav enables relative positioning of accuracies ±0.05m to be achieved with acoustic ranges of up to 1km. Working within a Long BaseLine array, Mini RovNav measures ranges to seabed transponders. Together with depth information, this data is digitally transmitted to the surface and combined with survey software to determine the position of the mobile relative to the array. The digital link (RS232 or RS485 full or half duplex) ensures that reliable communications with the Mini RovNav can be maintained despite the use of increasingly long umbilical. Mini RovNav is compatible with all compatt commands thus allowing a relative calibration of a seabed array from the remote vehicle without the need for direct ranging or telemetry to the surface vessel. This enables high accuracy, short range EHF equipment to be used in deepwater. When used with a Sonardyne USBL system, the Mini RovNav can be configured as a USBL Responder or as a LBL transceiver to provide a complete acoustic positioning solution. Key features (Type 7842) • Depth rated to 4,000 metres • Provides ranges up to 3km and positioning accuracy of ±0.15m • Sonardyne LBL and LUSBL compatible • RS232/ RS485 full or half duplex interface for fast position updates • Compact and rugged design Key features (Type 7860) • Type 7860 EHF Mini RovNav • Depth rated to 2,000 metres • Provides ranges up to 1km and positioning accuracy of ±0.05m • Enables high accuracy LBL equipment to be used in deepwater • Integral depth and temperature sensors • Powered from ROV's umbilical Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. [email protected] www.sonardyne.com Specifications Mini RovNav LBL Transponder Feature Depth Rating Operating Frequency Transducer Beamshape Transmit Source level (dB re 1µPa @1m) Receive Sensitivity (dB re 1µPa) Pulse Length Range Resolution Depth Sensor Options Depth Measurement: Resolution Accuracy @ 4ºC Temperature Measurement Resolution Accuracy Power Supply Power Consumption Dimensions (LxDia) Connector Types Mechanical Construction Weight in Air Options Type 7842 4,000 Metres MF (18-36kHz) Omni-Directional 190±4dB (High Power Mode) <96dB 4ms 0.1ms 500m, 2000m, 4000m 0.2% Full Range Output ±8m@4000m 0.01ºC 0.1ºC External Via ROV Umbilical 2 Watt between 18 – 72V 485mm (19.0”) X 95mm (3.7”) 8 pin AGP Plug, Type AGP-2608-F Aluminium Alloy Hard Anodised 5.5kg Noise Shield with remote transducer Specifications subject to change without notice - 01/2007 Type 7860 2,000 Metres EHF (50-110 kHz) Omni-Directional 190±sdB (High Power Mode) <100dB 1ms 0.01ms 500m , 2000m 0.2% Full Range Output ±4m@2000m 0.01ºC 0.1ºC External Via ROV Umbilical 2 Watt between 18 – 72V 518mm (20.3”) X 95mm (3.7”) 8 pin AGP Plug, Type AGP-2608-F Aluminium Alloy Hard Anodised 6kg Noise Shield with remote transducer