A、A.Skip zone
B、B.Blackout zone
C、C.Diffraction zone
D、D.Shadow zone
更多“If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.”相关的问题
A、a distinctive signal B、the Morse Code signal for SOS C、a computerized voice announcement of Mayday D、your vessel's International Radio Call Sign
A、use English language B、always use the International Code C、preface it by the word SOS D、follow the transmission with the radio alarm signal
A、A.use English language B、B.always use the International Code C、C.preface it by the word interco D、D.follow the transmission with the radio alarm signal
A、A.use English language B、B.always use the International Code C、C.preface it by the word "Interco" D、D.follow the transmission with the radio alarm signal
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