______ is a valid Selcall number for coast station used in ARQ communications.
If you intend to send a weather observation message, you will use the instruction ______.
FEC is used in connection with ______.
NBDP service is not available in ______ band.
The characters ______ are sent by the shore station to indicate that he has shifted control to and is awaiting instructions from the vessel.
What number will a ship station use to identify itself using NBDP?
Which HF NBDP mode would be selected to receive weather broadcasts from high seas shore stations?
Which of the following modes is used for NAVTEX transmissions?
How to detect whether an error appears to exist in the DSC message?
______ should be included in a DSC distress alert.
What shall be transmitted to avoid all ships in a large sea area being alerted?
Meteorological services will be developed by ______.
The proper operation of the DSC facilities shall be tested by means of a test call, when within communication range coast station fitted with DSC equipment. What is the period?
Relating to DSC facilities, what is the period of self-test?
WWNWS, the World Wide Navigational ______ Service, is a coordinate global service for the broadcast by radio of vital information on hazards to marine navigation.
