Which of the following frequencies is not used for DSC service
A: 829lkHz
B: 8414.5 kHz
C: 16804.5 kHz
D: 4207.5 kHz
A: 829lkHz
B: 8414.5 kHz
C: 16804.5 kHz
D: 4207.5 kHz
举一反三
- All of the following are DSC watch-keeping frequencies, except( ) A: . 2187.5 kHz. B: 2182 kHz C: 12577 kHz D: 6312 kHz
- 根据要求,配备MF/HF设备的船舶应在( )DSC频率上保持连续值守。 A: 2187.5/4207.5kHz B: 2187.5/8414.5 kHz C: 4207.5/8414.5 kHz D: 6312/12577 kHzD
- . Which of the following frequencies is as international distress and safety frequencies on MF for radio telephone? A: 2187.5 kHz B: 2174.5 kHz C: 2182kHz D: 2177. OkHz
- Which of the following MF frequencies is internationally allocated for use for transmitting NEVTEX-type broadcasts? A: 518 kHz using FEC mode. B: 4. 209. 5 kHz using FE mode. C: 486 kHz using FBC mode in China. D: All of the above.
- Which of the following frequencies are not DSC distress and safety frequency? A: 2187.5kHz. 4207.5kHz B: . 6312kHz. 8414.5kHz C: 2182kHz. 829lkHz D: 12577kHz.16804.5kHz