RedactedNarrative: SINGLE VESSEL CRASH. VESSEL WAS SOUTHEAST BOUND IN JOHNS PASS BETWEEN JOHNS PASS MARINA AND KEY CAPRI CONDOS IN TREASURE ISLAND.  VESSEL STRUCK A "SLOW SPEED" DAYBOARD ON ITS STARBOARD SIDE.  THIS RESULTED INB THE MARKER BECOMMING DISLOGED AND DRIFTED AWAY.  OPERATOR DID NOT REPORT CRASH AND IGNORED ATTEMPTS FROM MARINA STAFF TO FLAG HIM DOWN VIA CH16 & VISUALLY.  OPERATOR AND VESSEL WERE LOCATED THE FOLLOWING DAY.