Mach

Unidentified U.S. Navy aviation squadron — personal callsign patch ("Mach") · USN · 1950-1960s

An armored gauntlet thrown skyward, four knuckle rings spelling MACH in the manner of old sailor tattoo flash, set against a field of red and black diagonal bars. Patches of this kind are not squadron insignia but personal ones: a naval aviator's callsign rendered as a private heraldry, commissioned in small runs and worn where the wearer, not the command, decides. This example comes from a private collection and was worn on the left sleeve of a Navy commander's leather flight jacket — the traditional canvas on which a naval aviator records a career in cruises, dets, and hard-won names. The mailed fist is a long-standing borrowing from medieval heraldry in American military insignia, where it reads simply as force applied without apology.