US Navy THE THUNDER FROM DOWN UNDER SUBMARINE PATCH - Veteran Owned Business. 6" by 3" PATCH. Quality Embroidered US Navy THE THUNDER FROM DOWN UNDER SUBMARINE PATCH. Color. Durable with Iron On Backing. Great Detail and Stitching for a Jacket or Vest. Great Gift for ANYONE! HatnPatch Is THE Veteran Owned and Operated Family Business - 2 Generations of Retired Marines - We Ship Your Order Within 24 Hours And Usually The SAME DAY!