What does mean AYF?

    Бурундук

    Старожил
    Please, explain what does mean AYF in the sentence (about Gloster Javelin):

    "In addition with A.I. equipment Gee, A.Y.F., I.L.S. and I.F.F. were fitted".

    Can't find this abbreviation.

    Thank you in advance,
     

    Бурундук

    Старожил
    Mechanic, thank you for the interesting link. Yes, it seems it just letter code...