简介：DavidWilton,JohnAynesworth,andSmithareamongagroupofcadetshopingtobecomepilotsintheRoyalAirForce.David,however,haspoorheightperceptionandcannotmasterhislandings.Thereforeheissenttonavigator'sschool,butfindsithardtoconcentrateonhisnewjobduetodespondencyoverlosinghischancetobe"somethingimportant,"apilot.HisfriendsandteachersjoininanefforttoshowDavidthevastimportanceofthenavigator,somethinghelearnsforhimselfoverthetargetcityofBerlin.…