Question

When using GPS without Selective Availability, you may expect your horizontal accuracy to be better than __________.

a) 10 meters
b) 20 meters
c) 30 meters
d) 40 meters

Answer 1

The correct answer is b) 20 meters. Without Selective Availability, the typical horizontal accuracy of GPS is within 20 meters.

Step-by-step explanation:

The correct answer is b) 20 meters.

GPS accuracy depends on several factors, one of which is the presence of Selective Availability. Selective Availability was an intentional degradation of the GPS signal introduced by the U.S. Department of Defense to limit civilian accuracy. However, Selective Availability was turned off in the year 2000, leading to improved GPS accuracy.

Without Selective Availability, the typical horizontal accuracy of GPS is within 20 meters, which means that your position can be determined within a 20-meter radius of your actual location.