The Deck Unit receives serial inputs from GNSS as well as a PPS input. The deck unit interfaces to the towfish through a soft tow cable. Power is supplied by a 10-30V dc connection allowing the system to be operated from battery power on small vessels.
The waterproof electronics module is manufactured in aluminium and is rated to 1000 metres water depth. Its internal electronics generate and transmit the waveforms selected by the user. The return signals are received either from the integrated hydrophone or from the transducer and are instantly digitised prior to being routed to the Deck Unit via an ADSL link.