7-78I4 C
 What maintenance function may the holder of a GMDSS Radio Operator license perform, or supervise the performance of, on an Inmarsat-C SES?
A. Adjust the station's EIRP (power output) for improved signal levels.
B. Enter Azimuth and Elevation values correctly so the Inmarsat-C SES can find the NCS CC.
C. Remove stack deposits and other debris from the antenna to prevent degraded performance.
D. Adjust a reference oscillator or synthesizer to tune the unit to the NCS CC.
