4: Which of the following frequencies is not used for GMDSS?
A: 2182 kHz.
B: 500 kHz.
C: 518 kHz.
D: 2187.5 kHz.
A: 2182 kHz.
B: 500 kHz.
C: 518 kHz.
D: 2187.5 kHz.
B
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 is not used for DSC service A: 829lkHz B: 8414.5 kHz C: 16804.5 kHz D: 4207.5 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
- ________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
- 国际NAVTEX系统使用的专用频率是____。( ) A: 500 kHz B: 518 kHz C: CH16 D: 4 210 kHz
内容
- 0
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.
- 1
以下( )不是国际NAVTEX广播频率。 A: 490 kHz B: 518 kHz C: 4209.5 kHz D: 486 kHz
- 2
国际NAVTEX系统使用的专用频率是(<br/>)。 A: 500<br/>kHz B: CH16 C: 518<br/>kHz
- 3
我国英文NAVTEX的播发频率为()kHz。 A: 486 B: 490 C: 518 D: 2182
- 4
我国中文NAVTEX的播发频率为()kHz。 A: 486 B: 490 C: 518 D: 2182