KEY TOPIC-#001: FUNDAMENTAL CONCEPTS:

A. 8 MHz HF DSC, 1 other HF DSC, 2 MHz MF DSC and VHF Ch-70. B. 2 MHz MF DSC, 8 MHz DSC, VHF Ch-16 and 1 other HF DSC. C. VHF Ch-70, 2 MHz MF DSC, 6 MHz DSC and 1 other HF DSC. D. VHF Ch-70, 2 MHZ MF DSC, 4 MHZ DSC and 8 MHz DSC. 19C4 Proper watchkeeping includes the following: ................
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