I don't know what level of precision the altimeters are supposed to have
Accuracy decreases with range, but for comparison, a civilian Honeywell or Collins model will typically be accurate to about 2' at 500', increasing from 3% to 5% error as you approach 2500'.
Accuracy decreases with range, but for comparison, a civilian Honeywell or Collins model will typically be accurate to about 2' at 500', increasing from 3% to 5% error as you approach 2500'.