GMDSS: Element 7

1. A The antenna coupler/tuner calculates the proper spectrum band for the operator to use.
2. B To ensure transmissions are restricted to legal marine frequencies.
3. C The length of the physically-fixed antenna must be electrically matched to the intended frequency of operation.
4. D The antenna coupler/tuner indicates whether the ionosphere is ready to reflect a transmission properly.

Tip: press A-D to answer