bul ence ▁( you ▁don ' t ▁know ▁it ' s ▁there ▁until ▁you ▁hit ▁it .). ▁Cat 5 ▁( ab bre viation ) ▁- ▁A ircraft ▁Category ▁five , ▁beyond ▁repair ▁following ▁a ▁crash . ▁Car ry ing ▁Car p ets ▁- ▁The ▁st ance ▁of ▁some ▁R AF ▁Regiment ▁G unn ers . ▁C ater p ill ar ▁Club ▁- ▁Those ▁who ▁surv ived ▁a ▁b ail ▁out ▁by ▁using ▁their ▁par ach utes ▁were ▁awarded ▁a ▁special ▁' sil k ▁c ater p ill ar ▁bad ge ' ▁by ▁the ▁sil k ▁par ach ute ▁manufact ur ers . ▁C ▁B elt ▁- ▁Electric ▁shock . ▁CC ▁- ▁Conf ined ▁to ▁Camp ▁( o fficial ▁title ▁for ▁J ank ers ; ▁renamed ▁" Rest rict ions " ▁from ▁ 1 9 5 5 ). ▁C FS ▁( ab bre viation ) ▁- ▁Central ▁F lying ▁School . ▁Ch ain ▁Gang ▁( or ▁heavy ▁gang ) ▁- ▁A ircraft ▁handling ▁personnel . ▁Ch ance ▁Light ▁- ▁An ▁emer gency ▁' stop ' ▁light ▁at ▁the ▁end ▁of ▁a ▁run way ▁that ▁could ▁be ▁switched ▁on ▁on ▁request . ▁Cher ubs ▁- ▁Alt itudes ▁below ▁ 1 0 0 0 ▁feet ▁measured ▁in ▁hundreds ▁of ▁feet ▁e . g . Ch er ubs ▁ 5 ▁= 5 0 0   ft . ▁Ch icken ▁Sh it ▁- ▁The ▁oil ▁abs orb ent ▁gran ules ▁used ▁on ▁the ▁floor ▁by ▁mechan ics . ▁Chief ie ▁- ▁A ▁Chief ▁Techn ician , ▁a ▁technical