▁Royal ▁Navy . ▁F iz zer ▁- ▁Dis cipl inary ▁charge . ▁Flag ▁it ▁- ▁Being ▁told ▁by ▁an ▁officer ▁that ▁your ▁conf essed ▁off ence ▁doesn ' t ▁matter . ▁F LA K ▁- ▁From ▁the ▁German ▁F L ug Ab wehr K an one . ▁He avy ▁fla k ▁was ▁anti ▁aircraft ▁fire ▁from ▁weapons ▁with ▁a ▁L AR GE ▁cal iber , ▁and ▁light ▁fla k ▁from ▁weapons ▁with ▁a ▁S MA LL ▁cal iber ▁e . g . ▁machine ▁guns . ▁It ▁had ▁nothing ▁to ▁do ▁with ▁the ▁intensity ▁of ▁fire . ▁Fl amer ▁- ▁Sh ot ▁down ▁in ▁fl ames . ▁Fl aming ▁on ion ▁- ▁World ▁War ▁I ▁German ▁Anti - air craft ▁trac er ▁shell s . ▁F lap ▁- ▁A ▁cha otic ▁event . ▁F lare ▁- ▁The ▁final ▁landing ▁post ure ▁( e . g . ▁the ▁landing ▁f lare ▁angle ) ▁for ▁an ▁aircraft . ▁ ▁F lem ▁- ▁R AF ▁Fl ight ▁Line ▁Mechan ic . ▁F lare ▁path ▁- ▁K eros ene ▁or ▁sometimes ▁electric ▁landing ▁lights ▁each ▁side ▁of ▁a ▁run way . ▁F lick s ▁- ▁Search light s . ▁Fl un key ▁- ▁R AF ▁" C ater ing ▁& ▁Hospital ity ▁Special ist ", ▁( tra de ▁formerly ▁known ▁as ▁" Ste wards "). ▁ ▁Also ▁known ▁as ▁" A ir ▁Fl unk ies " ▁or ▁" T rol ley ▁Dol lies " ▁when ▁carrying ▁out ▁the ▁duties ▁of ▁cabin ▁cre ws ▁in ▁R AF ▁aircraft .