RedactedNarrative: Owner of Vessel #1 was backing vessel down ramp to launch vessel.  Occupant #2 was holding lines for the vessel on the dock. As vessel started to float Occupant #2 tried cleating off the line.  The vessel drifted away from the dock causing the line to tighten, pinning Occupant #2 fingers between the dock cleat and line.  This caused the injuries described in the attached Injury/Fatality report.  A good Samaritan cut the line releasing Occupant #2 from the cleat on the rock.