Q's re Terminology

[wkuh]

Some terms mystify me, perhaps someone can clue me in.

"bis" as a suffix to an air units identifier
"OBDL" as a kind of recon air unit
"EIS" as in unit "14. (EIS)/KG27"

[Denniss]

bis is an italian term and means improved variant, should be seen on aircraft types
EIS = Eisenbahn = unit specialized on train/rail attacks
OBDL = Luftwaffe High Command = Strat recon units directly reporting/assigned to high command

[eskuche]

Interesting! Would never have thought that for bis (separate from I-153BS which IIRC or assumed was bomber series).

Nomenclature was one of the hardest things for me coming into the game. Stab flights, RAD labor detachment, FBD, etc.

[wkuh]

Thanks (might have a few more some time.)