Fluent in Flags D4

For clarity, for Fluent in Flags D4, One minute you're crashing the yacht club open house, casually decoding signal flags like a cheap parlor trick over hors d'oeuvres, the next you're sunning your buns on the bunny pad of a ritzy sun deck, peering through these blue gradient lenses at the sparkling Mediterranean. (And your scout leader said learning flag signaling was a waste of time. HA!)