Vessel one was traveling from south to north in the Indian River. Vessel one turned right into the Sebastian Inlet channel heading in a  easterly direction.

As vessel one was inside the channel a wave hit the aft side of the vessel causing the captain to be thrown from the wheel and temporarily  lose control of his vessel.  Before the captain could regain control, the vessel collided with the #27 green marker in the Sebastian Inlet channel.
SEBASTIAN