At mid-day, what would be the best choice in attempting to communicate with a shore station some 75 miles (121 km) distant?
The range of a MF coast station is normally ______ nm.
Which of the following frequencies is an international distress and safety frequen-cies on MF for radiotelephony?
Regarding the functional requirements of GMDSS MF/HF equipment, which is not true?
______ is the means of initiating the transmission of ship-to-shore distress alerts in MF band.
A ship fitted with an MF radio installation shall, while it is at sea, maintain a continuous watch on ______.
The frequency ______ in the MF band is used for distress and safety traffic by radiotelephony.
In what circumstance(s), must a GMDSS-equipped vessel carry equipment capable of MF DSC transmission and reception?
Ships which operate in area A4 will have to carry ______.
For ship-to-ship distress alert, we can use ______.
In areas covered by INMARSAT, HF can be used as an ______ to satellite communications.
How many frequencies are available for DSC distress alerting on HF band?
Which of the following does not belong to HF band?
A ship fitted with an MF/HF radio installation shall, while it is at sea, maintain a continuous watch on ______.
Which of the followings is a valid 22-MHz ITU Channel?
