1-D-24: NAVTEX
1-24D1:
NAVTEX broadcasts are sent:
In categories of messages indicated by a single letter or identifier.
Immediately following traffic lists.
On request of maritime mobile stations.
Regularly, after the radiotelephone silent periods.
1-24D2:
MSI can be obtained by one (or more) of the following:
All of the above.
NAVTEX.
SafetyNET.
HF NBDP.
1-24D3:
Which of the following is the primary frequency that is used exclusively for NAVTEX broadcasts internationally?
518 kHz.
2187.5 kHz.
4209.5 kHz.
VHF channel 16 when the vessel is sailing in Sea Area A1, and 2187.5 kHz when in Sea Area A2.
1-24D4:
What means are used to prevent the reception of unwanted broadcasts by vessels utilizing the NAVTEX system?
Programming the receiver to reject unwanted broadcasts.
Operating the receiver only during daytime hours.
Coordinating reception with published broadcast schedules.
Automatic receiver de-sensitization during night hours.
1-24D5:
When do NAVTEX broadcasts typically achieve maximum transmitting range?
Middle of the night.
Local noontime.
Sunset.
Post sunrise.
1-24D6:
What is the transmitting range of most NAVTEX stations?
Typically 200-400 nautical miles (360-720 km).
Typically 50-100 nautical miles (90-180 km) from shore.
Typically upwards of 1000 nautical miles (1800 km) during the daytime.
It is limited to line-of-sight or about 30 nautical miles (54 km).
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Color key:
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● = Unseen
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● = Weak
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● = Review
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● = Learned
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● = Incorrect answer
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