GMDSS: Element 7

1. A Selects duplex operations for U.S. coastal waters and simplex operations in non-U.S. waters, on the "alpha" channels.
2. B Changes selected international duplex channels to simplex channels for use in U.S. waters.
3. C Both of the scenarios above may be set up and selected by the operator.
4. D None of the above

Tip: press A-D to answer