Callsign FUKC01-08
The fFrench used a similar c/s for their tankers. FUKCD was one IIRC
Very young, female FO at Sopley was having real difficulties with it as he repeatedly flew out of the towline and getting in everybody's way. To compound things one of the top brass was visiting He bent over her shoulder and asked the poor girl, "What's the matter my dear?" to which she threw off her headset, tried to stand up, turn around and salut all at the same time and blurted out, "It's F
d Sir!"
Funnier if you were there