RedactedNarrative: THE CRASH OCCURRED AS VESSEL 1 AND 2 WERE TRAVELING ON THE GRAND GLAIZE ARM. OPERATOR 1 FAILED TO KEEP A PROPER LOOKOUT AND WAS INATTENTIVE FOR AN UNKNOWN REASON WHICH CAUSED VESSEL 1 TO STRIKE THE REAR OF VESSEL 2 AND CAUSE DISABLING DAMAGE TO VESSEL 2. OPERATOR 1 THEN FLED THE SCENE AND DID NOT RENDER ASSISTANCE TO VESSEL 2.