Within SEA AREA A1, which HF/MF DSC frequency is used for data transmissions?

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Multiple Choice

Within SEA AREA A1, which HF/MF DSC frequency is used for data transmissions?

Explanation:
DSC data uses a dedicated data carrier on MF/HF, and in this area it is 2187.5 kHz. This frequency is specifically reserved for DSC data transmissions (digital distress, safety, and calls), keeping them separate from voice channels. The 2182 kHz frequency is used for audible MF distress voice calls, not data. The other options are VHF frequencies (Channel 70 data at 156.525 MHz or Channel 16 at 156.8 MHz) and not the MF/HF data channel used in SEA AREA A1.

DSC data uses a dedicated data carrier on MF/HF, and in this area it is 2187.5 kHz. This frequency is specifically reserved for DSC data transmissions (digital distress, safety, and calls), keeping them separate from voice channels. The 2182 kHz frequency is used for audible MF distress voice calls, not data. The other options are VHF frequencies (Channel 70 data at 156.525 MHz or Channel 16 at 156.8 MHz) and not the MF/HF data channel used in SEA AREA A1.

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