A. Positional accuracies ~ 1 2 m if rover is less than 1-2 km from the reference station
B. Positional accuracies ~ 5 10 m if rover is less than 25 km
C. Positional accuracies ~ 5 10 m if rover is less than 5-10 km from reference station
D. Positional accuracies ~ 2 5m if rover is less than 2-5 fm from the reference station