This patch was created by VAQ-130, and I think it commemmorates their early years as VAW-13. This is the Det-31 patch for the WestPac ’68 tour in Vietnam. VAW-13 and all of its detachments were redesignated as VAQ-130 on 1 October 1968, so this patch is a commemorative of its ancestor. The Det numbers were the carrier hull number, so the Det patch chosen for this commemorative was aboard Bon Homme Richard for her 1968 WestPac cruise.
