1. denim shirt, slacks, wide leather belt, knife in scabbard, white or blue tennis shoes or boots, with or without blue windbreaker or blue preserver jacket, yachtingcap or wool cap. White overalls for engineers, no caps. (BO 21, 11 Jun 67)Uniform B (Def. 1)2.Uniform B is for everyday postwork other than deck, E/R or other dirtywork. (COLRHED 7)