Radio Navigationmedium#1142
GBAS (Ground-Based Augmentation System) is used for:
A
En-route navigation only
B
Satellite orbit determination
C
Oceanic navigation
D
Precision approaches at individual airports using local ground reference stations
CorrectExplanation
GBAS provides local differential corrections from ground reference stations at an airport, enabling CAT I (and potentially CAT II/III) precision approaches.
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