RedactedNarrative: UNIT 1 WAS SITTING STILL WHEN UNIT 2 TRAVELING AT A HIGH RATE OF SPEED STRUCK UNIT 1 . UNIT 2 STRUCK UNIT 1 IN THE BOW. UNIT 2 LEFT TRANSFER MARKS AND DAMAGE TO THE BOW OF UNIT 1. UNIT 2 HAD TRANSFER , MARKS ON THE UNDERSIDE OF THE BOW FROM STRIKING UNIT 1.