USS SENTRY MCM-3 SHIP HAT. Avenger-class mine countermeasures ship. Participated in NATO exercise Blue Harrier ‘95; Baltic Sea. Navy Blue Cap High Detail and Impact. 8 Rows Stitching on Visor and Pro Stitch on Crown 5 panel hat. Adjustable Size, Navy Blue Golf Style. Great Gift Idea for ANYONE, especially those shipmates who served on the USS SENTRY MCM-3, or who are interested in its history. HatnPatch Is THE Veteran Family-Owned and Operated Business. We Generally Ship Orders Within 24 Hours And Usually The SAME DAY!