Meaning of some terms
I was wondering if someone who might be able to kindly help me please with a couple of aviation terms from 1983?
1 What does the 'B & D' mean in a 'B & D cabin display'?
2 What does the 'T/X' mean in 'Radar T/X'?
3 What was a 'Flight Text' in 1983? I am assuming it is not the same as a mobile phone text today as mobiles were not freely available in 1983?
4 What is the 'T' in 150 degrees T. Someone said it was 'True' but someone else told me it stood for 'Turing'.
Many Thanks
KeMac