RedactedNarrative: V1 WAS TRAVELING BEHIND V2 IN THE ICW SOUTHBOUND.  V2 SLOWED FOR THE 312 BRIDGE SLOW SPEED ZONE,V1 STRUCK V2 AT THE STERN AND RAMPED THE VESSEL LANDING ON TOP OF V2 BREAKING THE PORT WINSHEILD.   FOLLOWING THE IMPACT THE V1 SLID BACK OFF THE STERN OF V2.