NVA-Fliegers explain (almost) everything like only Germans can explain. Komplexes Landesystem SP-1 divided into OSP, RSP, PRMG, RSBN. OSP includes essential rather peculiar lighting system with already shown (morse coded) Light beacon, SKP communication and a number of navigation systems. Franzl can no doubt give helping hand with German language
I try to help with that.
Everything said already, here a translation to the lantern:
The code beacon is deployed at the position of the Inner marker beacon.
It provides the pilot at night with a visual indication of the distance to the runway (1000m) and assigns a unique identifier of the airport and the approach direction. The identification is with morse-code at a rate of 15 codes per minute.
The code consists of nine fluorescent lights in the color yellow to red. At favorable visibility conditions and corresponding altitude you can see the beacon code dozens of kilometers.
Due to the construction it wont be of any use in dense fog, at least thatīs what i think it would be.
franzl