User manual

Glossary

are formed in such a way that the identity or part thereof can

be used by telephone and telex subscribers connected to the

general telecommunications network to call ships

automatically.

PTT Push To Talk

TU Transceiver Unit

VDR Voyage Data Recorder, a data recording system designed for all

vessels required to comply with the IMO’s International

Convention SOLAS Requirements in order to collect data from

various sensors on board the vessel.

VHF Very High Frequency