Incorrectly formatted DSC calls from other vessels result in a warning in the DSC alarm screen but the vessel still might be switched to an illegal or improper outcome.

The transceiver may be switched out of the marine bands or the frequency may not match the requested priority or emission.

The automatic transceiver switching software always detects improper priorities, emissions & frequencies to ensure there is no danger.

The automatic transceiver switching feature always interrupting safe navigation of your own vessel and placing the unit on the GMDSS Distress, Urgency or Safety follow-on frequencies.