Hello.
I've been flying an Aviatik BI recon aircraft awhile now ( Jan 1 1915 - 18 march 1915 ). According to Kenneth Munson https://www.amazon.com/Pocket-Encyclopaedia-World-Aircraft-Bombers/dp/0713704845/ref=asap_bc?ie=UTF8
Aviatik BI was used in western front only 1914.
Aviatiks BII and C model are available in game only from Sep. / Oct. 1915.

Wikipedia says that CI was introduced in front from April 1915 onwards. BII .. Well, I could not find anything specific about it's usage in western front, but I would assume that it has been used before C models.

Could that be changed to more historical direction?
I was examining aircraft folder, and noticed that atleast all Aviatik XDP files had similar line EnteredService="01/01/1917" LeftService="11/12/1918"

All other aircraft have logical entering and leaving dates.

yours Cpt. Kremmen

Kremmen, according to the Frontbestand inventory there was only 1 C.I at the front at the end of April 1915, 8 at the end of June, 9 at the end of August and 35 at the end of October. Sep./Oct. seems reasonable date for availability.
As for B.II: 1 at the end of June 1915, 29 end of August, 38 end of October, 32 December, etc. This also doesn't seem to be too far off.
Found this info in Jack Herris' Aviatik Aircraft of WWI.

Windsock Datafile for the BI has Frontbestand Inventory
31/08/14 -12
31/10/14 -43
31/12/14 -51
30/04/15 -76
30/06/15 -48
31/08/15 -35
31/10/15 -20
31/12/15 -11
for the BII
31/08/15 -29
31/10/15 -38
31/12/15 -32
28/02/16 -18
I think you will find WoFF reflects that pretty well.

Cheers,
shredward

Interesting. Munson's book is a bit vague about German Aviatiks.
A pity that you cannot find frontbestand inventory from internet. That would be an interesting read.

Munson's book was good for it's time, but thanks to great research we have much more data available to us now than was available to him
Cheers,
shredward

I believe this is what you're looking for: Frontbestand on Aerodrome