RedactedNarrative: V-1 was towing V-2 in hip tow East down Dania Cut-off Canal. The top of V-2 collided with the CSX Train Bridge. The operator of V-2 was sitting in the helm chair at the upper helm. The pedestal chair broke and the operator fell backwards onto the upper deck.  V2 operator was diagnosed with a concussion and sprains to his left shoulder and right ankle.