A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a __________.
Official USCG Answer & Rule Citation
Correct Answer: Option D — good fix
HDOP (Horizontal Dilution of Precision) quantifies the geometric positioning quality of GPS satellites. Lower numerical values indicate superior satellite constellation geometry, where wide angular separation between satellites minimizes positioning error and yields a highly accurate navigational fix.
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