GMDSS. FCC Test 31

Which of the following is the primary frequency that is used exclusively for NAVTEX broadcasts internationally?

4209.5 kHz
518 kHz
VHF channel 16 when the vessel is sailing in Sea Area A1, and 2187.5 kHz when in Sea Area A2.
2187.5 kHz

Which of the following statements is true?

The GMDSS Radio Operator can select the 'None' option in the message category menu.
Upon entering a new NAVTEX station's broadcast range, the GMDSS Radio Operators enters the station's selcall number.
The GMDSS Radio Operator can program the NAVTEX receiver to reject all messages except navigation warnings, meteorological warnings, and search and rescue information.
The GMDSS Radio Operator can program the NAVTEX receiver to automatically reject any category of messages under the master's authority.

What means are used to prevent the reception of unwanted broadcasts by vessels utilizing the NAVTEX system?

What is the transmitting range of most NAVTEX stations?

How can reception of certain NAVTEX broadcasts be prevented?

Automatic receiver desensitization during night hours.
Coordinating reception with published broadcast schedules.
Stations are limited to daytime operation only.
The receiver can be programmed to reject certain stations and message categories.

What should a GMDSS Radio Operator do if a NAVTEX warning message is received but it contains too many errors to be usable?

Contact the NAVAREA coordinator and request a repeat broadcast.
Listen to appropriate VHF weather channel for repeat warnings.
Do nothing. Vital NAVTEX messages will be repeated on the next scheduled broadcast.
The hurricane will be upon the vessel; they're in big trouble.

How is a NAVTEX receiver programmed to reject certain messages?

The transmitting station's two-digit identification can be entered to de-select reception of its broadcasts.
By entering the selcall of the transmitting station.
By pressing '00' in the transmitter's ID block.
By choosing a message category's single letter (A-Z) identifier and then deselecting or deactivating.

What does a NAVTEX receiver do when it runs out of paper?

The system will automatically change from receiving MSI by NAVTEX to receiving it by SafetyNET so that no messages will be lost.
The unit cannot operate, and all subsequent MSI broadcasts are missed until the paper is replaced.
It will give off either an audible and/or visual alarm.
All of the above.

How is mutual interference among NAVTEX stations avoided?

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