RedactedNarrative: OPERATOR 1 WAS OPERATING VESSEL 1 WHILE TRAVELING AT IDLE SPEED. AS OPERATOR 1 WAS UNDERWAY WITH VESSEL 1 OPERATOR 1 FAILED TO KEEP A PROPER LOOKOUT AND TRAVELED OVER THE ANCHOR LINE CAUSING IT TO BECOME ENTANGLED IN THE PROPELLER. DUE TO GETTING THE ANCHOR LINE CAUGHT IN THE PROPELLER IT CAUSED VESSEL 1'S TRANSOM TO FALL BENEATH THE WATERLINE AND VESSEL 1 TO SWAMP. OPERATOR 1 WAS ABLE TO LEAVE VESSEL 1 VOLUNTARILY AND DID NOT SUSTAIN ANY INJURIES. VESSEL 1 WAS A TOTAL LOSS DUE TO THE SWAMPING.