Hi Nick,
Thank you very much especially for the update on NJ St Norwegen.
A comment if I may.
Oberst Bongartz was not a fighter controller as such. He had previously served as Nacht Jagd Raum Führer 100 http://www.gyges.dk/Nacht%20Jagd%20Raum%20Fuehrer.htm
( a position equivalent to the RAF Sector Controller) at Grove, and I think he was posted to Finland in this function as well. This them begs the question of the location of "NJRF Finland".
bregds
SES