GMDSS: Element 7

1. A Maximum Usable Frequency (MUF) and Optimum Usable Frequency (OUF) should be calculated prior to setting up the transceiver.
2. B Propagation rules, Sunspot cycle status and seasonal variations (winter & summer) must always be employed to calculate the proper band selection.
3. C Propagation "rules of thumb" are usually sufficient for routine operations.
4. D Propagation "rules of thumb" should be combined with Solar flare alerts to determine band selection.

Tip: press A-D to answer