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
A: 2187.5kHz. 4207.5kHz
B: . 6312kHz. 8414.5kHz
C: 2182kHz. 829lkHz
D: 12577kHz.16804.5kHz
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
- 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
- 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
- ________是无线电话遇险与安全通信频率。 A: 2187.5 MHz B: 2187.5 kHz C: 2182 KHz D: 2174.5 kHz