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
A: 2187.5/4207.5kHz
B: 2187.5/8414.5 kHz
C: 4207.5/8414.5 kHz
D: 6312/12577 kHzD
举一反三
- 符合GMDSS要求，配备MF/HF设备的船舶应在（）DSC频率上保持连续值守. A: 2182/2187.5 B: 2174.5/8291 C: 2187.5/8414.5 D: 4207.5/8414.5
- 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
- All of the following are DSC watch-keeping frequencies, except( ) A: . 2187.5 kHz. B: 2182 kHz C: 12577 kHz D: 6312 kHz
- ________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
- . 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