Gmdss : Element 7 - 493/600
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| The proper sequence of channel spacing from narrow to widest is: |
| A) SSB voice, NBDP SITOR, VHF-FM voice. |
| B) VHF-FM voice, NBDP SITOR, SSB-voice. |
| C) NBDP SITOR, VHF-FM voice, SSB-voice. |
| D) NBDP SITOR, SSB-voice, VHF-FM voice. |
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