I noticed that, from version 1.15.2, so even the 1.16.0, the radar can track a chopper flighting under 15 feet. It happens from ground forces, carrier, helicopters and airplanes. What is the matter? Do they switch very quickly (I think too much quicly) from air to ground radar? I'm sure it is unreal and what is your experiences? And even if you go behind an hill or a palace, the missle hits you...

For me is not unreal, I think you can modiffy the low value to radar detect in gwut ballistic file.
Yes, when you cover under a hill or buiding the láser american missiles fro IA hit you. Its wrong, so its necesary more free coders to fix some bugs. Thealx contributed a lot, but now is in other staffs.
Is needing coders, please!!!!!!

The first gulf war began with eight Apache flying under 15 feet toward the enemy lines. They destroyed some enemy's radars to allow the air strikes. They wasn't detected.
http://www.defensemedianetwork.com/stories/gulf-war-20th-apache-raid/

It would be nice to hide in ground clutter, but that would also make the 2S6 Tunguska a vastly more important AA unit than it is right now. However, the Strela in game fires radar guided missiles. In reality the radar is used for ranging and not guidance. According to wikipedia, the missiles are infrared and should be vulnerable to flares (and the naval SAMs should be vulnerable to chaff. They are not.)

Right now anti-ship strikes are suicide missions that would be better suited to jets.

I quote you, the 1.15.0 was the last version that allows you to manage the anti-ship strike under the 15 feet radar. Now it is a kamikaze mission, absolutely no hope to retur to the base.