问题:
A . A unique radar signal consisting of a blip code radiating outward from a SART's position along its line of bearing
B . A unique two tone "warbling" signal heard on VHF-FM ch-70
C . A unique two tone alarm signal heard upon the automatic unmuting of the 2182 kHz radiotelephone automatic watch receiver
D . The SART signal appears as a target which comes and goes; the effect of heavy swells on the SART
● 参考解析
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