How to get target locks without exposing the chopper?

I know it is possible. I’m observing this quite a while now. Despite the radar is very much clear without any contact, suddenly Hellfires appear in the air, killing ground units. Mainly on pit like maps…so something like Vietnam with lotsa stupid mountains, rocks and hills around the ground map. So air assets have an easy time farming kills. There are quite a few maps with this design school.

I watched some replays and it seems to be possible with fiddling with around 3rd person view, carefully dipping up and down behind a rock formation or whatever. Players seem to fire missiles off without any part of the heli above the cover. Dunno how it works; i can’t replicate it. Or is it heli specific? Seems to be mainly done by AH-64’s.

I have a hard time with my prem Tiger vs. all these SPAAs. I also tried this with my periscope mast…but somehow I cant lock while behind cover. So how its done exactly?

I think they predesignate the laser, fire while hiding behind cover and then before the hellfire’s hit, they pop out and guide it

No its not. Nothing visible. And its done without F&F missiles. They somehow have the point on target without any radar return. Not a second. There must be a workaround I don’t grasp.