7977

Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. sales@sonardyne.com www.sonardyne.com Datasheet Programmable Generic Transponder (PGT) Description The Programmable Generic Transponder (PGT) is the successor to Sonardyne's popular Type 7730 HPR Transponder/Responder. Available in three versions; Type 7971 Omni-Directional, Type 7977 Directional and Type 7978 Super Directional, the PGT family incorporates Sonardyne's latest acoustic design developments with the hardware already installed to permit through-life upgrading of functionality. Key Features • Depth rated to 2,500 Metres (4,000 Metre rated option available) • Channel selection via dual external controls or optional serial data port • Depth telemetry capability option • 'Screw-off' acoustic release available • Choice of housing lengths to suit deployment scenario and application Type 7977/7978 Features include a depth telemetry capability for improved positioning accuracy, channel selection via dual external controls (or optional serial data link) and innovative 'screw-off' acoustic release mechanism. These benefits are combined with an increased depth rating (2,500m, 4,000m or 6,000m) and compatibility with all HPR 300 and HPR 400 channels. Where size and weight are important operational factors a short housing version is available (requires external power supply). • Depth rated to 2,500 Metres (4,000 & 6,000 Metre rated option available) • High power Directional and Super Directional transducers • Depth telemetry capability option • 'Screw-off' acoustic release available' • External On/Off and channel controls • Choice of short (No battery) or long housing available Applications for the PGT include the accurate tracking of cable ploughs and deep ROVs, long term marking of seabed targets (e.g. wellheads) and as a position reference transponder for dynamic positioning systems. Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. sales@sonardyne.com www.sonardyne.com Specifications Programmable Generic Transponder (PGT) Feature Depth Rating Operating Frequency Channels Transducer Beamshape Transmit Source Level (dB re 1µPa @1m) Number of Transmission (High Power on Channel 33) Receive Sensitivity Listening Life (Days) Mechanical Construction Dimensions (LxDia) Weight in Air Weight in Water Features Options Type 7971 Type 7977 Type 7978 2,500 Metres 2,500 Metres 2,500 Metres (4,000 Metre option (4,000 Metre option (4,000 & 6,000 Metre available) available) options available) HPR 300/400 Channels HPR 300/400 Channels HPR 300/400 Channels Omni-Directional ±130º Directional ±30º Super-directional ±12º 192dB ±3dB 200dB ±3dB 206 ±3dB Alkaline:1.0 X 10 Alkaline: 0.8X10 Alkaline: 0.5X10 Lithium:2.3 X10 Lithium: 1.8X10 Lithium: 1.2X10