Old navy nickname for a Signalman. The Signalman was a rating from 1921-2004. Consisted of primarily of Visual Communications between ships. Morse Code via Flashinig signal light, Semaphore hand/flag signals and Signal flags flow from a halyard (Line) on the mast of a ship and basic naval honors and ceremonies. Time and Technology finally caught up to this Job skill, which most who have mastered it consider it a now lost art form.
Those damn Skivvie Waver's are a bunch of skates!! We're down here sweepin' and swabbin' and they just sit up there on the Signal Bridge and drink soda and eat geedunk.