RedactedNarrative: OPERATOR OF V1 STATED A PASSANGER SECURED ANCHOR PIN.  ONCE UNDERWAY, A NOISE WAS HEARD FROM THE STARBOARD SIDE.  OPERATOR STATED THAT V1 WAS TAKING ON WATER. V1 WAS THEN PUT INTO NEUTRAL AND SAW THAT ANCHOR LINE SINK INTO WATER.  ANCHOR HIT HULL OF V1.