Advanced Navigation Subsonus

Advanced Navigation Subsonus is a compact ultra-short-baseline acoustic positioning and communications system for tracking underwater vehicles, divers and instruments. Eight hydrophones, internal inertial sensing and beamforming calculate range, bearing and acoustic heading, while the integrated modem exchanges data with compatible subsea equipment at distances up to 995 metres.

All signal processing runs inside the unit, with Ethernet connectivity and a web interface for configuration and monitoring. Advanced Navigation specifies position accuracy from plus or minus 100 millimetres at five metres to plus or minus five metres at 1,000 metres, subject to operating conditions. The 20- to 32-kilohertz transceiver measures 106 by 106 by 93 millimetres and weighs 1.17 kilograms in air.