Closed doors at the Main Base (Metal Gear Solid 5: The Phantom Pain)

Also interesting, they are kind of active, but they glow red.
There are doors that are not active at all, everything is clear with them, but what about the red ones? Are there those who know?

Yin-Ro-Gan
Alfi1
This is cut content. (Ala Mafia 2)

Alfi1
There are red doors - this is the command center of the platform - they are open when performing attacks on the Forward Bases of other players (you need to get into them to complete the infiltration mission). All squad platforms have such a door.

honey barracks to the maximum apnee chamber with a groove will open

Brock Samson
Not necessarily to the maximum, the main thing is just to build a platform for the medical squad, it is on the first.