Radio Navigationmedium#1145
Selective Availability (SA) on GPS was:
A
An intentional degradation of GPS accuracy, turned off permanently in May 2000
CorrectB
A method to improve GPS accuracy
C
Still active today
D
Used only during military conflicts
Explanation
Selective Availability intentionally degraded GPS civilian accuracy. It was permanently deactivated on May 1, 2000, improving civilian GPS accuracy from ~100m to ~15m.
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