RedactedNarrative: V1 and V2 were both traveling northbound in St.Joseph sound in the vicinity of marker R38, approximately one half mile SW of Fred Howard Park in Tarpon Springs. V1 was traveling approximately 25 mph while V2 was traveling slightly faster on the left (west) side of V1. Occupants of V1 claimed V2 suddenly turned to the right (east) in front of V1 into its path and continued its right turn which brought it head on into the bow of V1. The operator of V2's face hit the front deck edge of V1 causing facial injuries. V1 was a pontoon vessel and the jet ski continued under V1 between the pontoons impacting the forward side of the outboard motor disabling it. Operator2 Impacted with front of other vessel caused multiple broken bones in victims face. Hospital personnel advised no brain injury.