hm ye but basically with either visual or radar fix, it will always be ~+- 50m off , or so, at least thats what i noticed. so for a weapon like the bk90 in compact mode it would be quite expected that it will not be super accurate, unless you have a terrain that constantly has a 5 on the terrnav-fix. *edit: or you do a radar fix on the target, but like if there is a situation where you cant quite do that coz you have to stay on a very low altitude, that would be difficult ) i noticed that when in flat terrain, for example in the area around kutasi on caucasus, the waypoint quickly drifts a few dozen meters, yet i saw some videos of a guy practicing rockets ( with the circle indicator on the target waypoint) and he always had 0 drift, i`m really wondering how that`s possible.
The accuracy of the BK90 is not dependent on the navigation accuracy of the Viggen itself since it has it's own radar altimeter and INS. I found it always flies towards the accurate coordinates that the target waypoint was set on. Now obviously you can't launch it when the CK37's target point is WAAY off as it would waste a lot of energy turning towards the correct target point but I've launched it and it has hit the target accurately with a 3km position error before.
