Why do you feel the need to do that?
Didn't want to offend you
that would indeed be a landing light
That's an optical data coupler, one of the secret technologies they developed together with the germans.
It could send information about enemy positions straight to the nazi moon base, or the antarctic one for the same matter.
The prop blades crossing the data beam somewhat limited the available baud rates though, which is why they later used flying saucers for relay stations.
Mike