Does anyone know what the abbreviations "Ft" and "Abst." on FuG 16ZY Anschlussdose AD 18 Y (Anforderungszeichen Ln 27266-2) mean / stand for (incl. source)?
I think "Ft", sometimes referred to as "FT-(Sprech-)Verkehr", may stand for "Funktelefonie" (normal transceiver mode), but I cannot find a source to verify.
"Abst." is probably ZY mode ...
Z=Zielflug=DF=Directional Flight in the direction of a beacon
Y=Y-Verfahren=transponder system in which a ground station sends out a pulse which is received by the aircraft. The Aircraft resends this pulse on a different frequency allowing the ground station to determine the direction and distance of the aircraft
So "Abst." could mean "Abstrahlen"...
Can anyone shed some light on that?
Update:
http://www.nonstopsystems.com/radio/pdf-hell/article-hell-bernhard-DLftT-FG16ZY.pdf
P. 39:
Thanks to mwd2.