The followings are all characteristics of portable VHF radio telephone sets, expect ______.
The ______ is designated for VHF digital selective calling.
The ______ is designated for GMDSS Digital Selective Calling in general services.
At mid-day, ______ would be the best choice in attempting to communicate with a shore station some 15 nautical miles distant
The frequency 156.525 MHz and 156.800 MHz belong to ______ band.
What does the abbreviation “VHF" stand for?
A VHF frequency channel pair of TX 157.200 MHz and RX 161.800 MHz would most likely be ______.
Which of the followings is main factors to influence the propagation range for VHF?
The carrier power of ship VHF transmitters shall not exceed ______.
An area excluding sea area Al, within the coverage of at least one MF shore station in which continuous DSC distress alerting is available is ______.
Ship-to-ship distress alerting should be conducted by ______.
The DSC frequency for distress alerting in area A2 is ______.
What is the approximate range of MF radio waves during the daytime?
Which frequency in the medium frequency band is used for distress and safety traffic by radiotelephony?
How many MF frequencies are available for DSC distress-related calls?
