Glossary
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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.
P
PTT Push To Talk
T
TU Transceiver Unit
V
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
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