Thanks Gunars..!
The location of Flieger Staffel Forell at Tukum is interesting, as there had been an earlier KEK there with the name Staffel Tukum.
Staffel Tukum had been dissolved on 17 Mar 1917, the reason for that is unknown to me, but perhaps the unit was drained on pilots with the formation of Jastas..?
The exact location of Flak units stationed near the front line is more or less useless, as they were "hot targets" for enemy artillery fire, and therefore made frequent moves within an area...
The moves was also dependant so that the enemy flyers did not were able to fly within secure corridors..
Gunnar