GMDSS Maintainer: Element 9

1. A The transmitting station's two-digit identification can be entered to de-select reception of its broadcasts.
2. B By entering the SELCALL of the transmitting station.
3. C By pressing "00" in the transmitter's ID block.
4. D By choosing a message category's single letter (A-Z) identifier and then deselecting or deactivating.

Tip: press A-D to answer