In SEA AREA A1, which HF/MF DSC frequency is designated for the audible alarm mode?

In SEA AREA A1, which HF/MF DSC frequency is designated for the audible alarm mode?

• A. 2182 kHz
• B. 2187.5 kHz
• C. 156.525 MHz
• D. 156.8 MHz

Answer: (A)

Audible alarm mode on MF/HF DSC uses the MF distress frequency 2182 kHz. In SEA AREA A1, ships monitor this MF channel for distress and safety alerts, so designating the audible alarm to 2182 kHz ensures the signal is heard on the same band and familiar channel used for distress traffic. The other options aren’t the MF/HF DSC audible alarm frequency: 2187.5 kHz is the DSC calling frequency used to initiate digital DSC calls, while the remaining two are VHF frequencies outside the MF/HF range. Hence, 2182 kHz is the correct choice.

Audible alarm mode on MF/HF DSC uses the MF distress frequency 2182 kHz. In SEA AREA A1, ships monitor this MF channel for distress and safety alerts, so designating the audible alarm to 2182 kHz ensures the signal is heard on the same band and familiar channel used for distress traffic. The other options aren’t the MF/HF DSC audible alarm frequency: 2187.5 kHz is the DSC calling frequency used to initiate digital DSC calls, while the remaining two are VHF frequencies outside the MF/HF range. Hence, 2182 kHz is the correct choice.