To ensure effective HF communications, GMDSS...
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Question 1 of 27070
OdmEixRshePbNxWt3aWS
To ensure effective HF communications, GMDSS operators should:
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A
Employ the short rules of propagation selection or rely on previous successful communications as a guide .
B
Disregard the short rules of propagation selection and try different bands until one works.
C
Do not rely on previous successful communications on the selected frequency band - the ionosphere changes too rapidly and inconsistently.
D
Rely on the equipment calculations of Optimum Usable Frequency.
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Question 1 of 27070
OdmEixRshePbNxWt3aWS
Q
To ensure effective HF communications, GMDSS operators should:
A
Employ the short rules of propagation selection or rely on previous successful communications as a guide .
B
Disregard the short rules of propagation selection and try different bands until one works.
C
Do not rely on previous successful communications on the selected frequency band - the ionosphere changes too rapidly and inconsistently.
D
Rely on the equipment calculations of Optimum Usable Frequency.
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