The killflags people are merchandising a fancy boat skin only. It has no special capabilities. It displays the kill flags on the conning tower and has your boat's number on the bow:
The business end of the Kraken:
The bragging part:
Mine is based on the Captain Cox Hi-Res Redfin shark bow with USS Kraken emblem on the conning tower. It was custom modified by Digital Trucker, adding the blinders and cane after I lost both periscopes off the coast of Japan and successfully returned blind, 3,000 miles back to Pearl. This shot is from the cruise before I was issued that special insignia. That was the highlight of all my 17 TMO cruises so far. The yo-yo technique saved my tail that trip.