7860

Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. sales@sonardyne.com 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. 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. 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 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. 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. Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. sales@sonardyne.com 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)