Which frequency should a cancellation announcement follow a false distress alert on MF?

The correct choice for the frequency where a cancellation announcement should follow a false distress alert on MF is 2182.0 kHz. This frequency is designated as the international distress frequency for MF maritime radio communications. According to the Global Maritime Distress and Safety System (GMDSS) procedures, if a false distress alert has been transmitted, it is essential to utilize this frequency to notify other vessels that the alert was sent in error.

This practice helps ensure that vessels monitoring the distress frequency are made aware that the situation is not an emergency, thereby allowing them to resume their normal operations without the confusion that a false alert can cause. Using the proper frequency consolidates communication protocols and aids in maritime safety by reducing unnecessary responses to false alarms.

The other frequencies listed have specific uses but are not designated for distress cancellation announcements. For instance, 2187.5 kHz is typically used for DSC (Digital Selective Calling) purposes, while the other options are not recognized in the same primary capacity for cancellation in this context.