Hi
I’m a student aeronautical engineering from Belgium. For a project, we are working on ir lock based system that will give us the possibility to land a quadcopter autonomously on a moving usv (boat).
We are looking for the precise working principle of an IR-lock system, but there is nothing to find on the internet that gives really good explanation.
Can someone help us in sharing your knowledge about IR lock?
Regards Elias (srry for bad English 
)