RedactedNarrative: Unit 1 was traveling up river on the stono river near sol legare landing.  Operator stated that steering was tight and the vessel started sliding towards the dock.  Operator tried to steer away from dock but was unable to avoid the dock.  Unit 1 capsized after hitting the dock and a kayak on the dock.  The kayak sustained fiberglass damage to the midsection.  The operator and passenger were ejected out of unit 1.  Both were able to make it to shore where they were transported to musc for medical care.