Vessel 1 was under sail in the clearlake ship channel proceeding east at approximately 3 knots.  Vessel 1 reported hearing a boat coming up from behind at a rapid pace.  Vessel 1 reported yelling at vessel 2 to watch out but it reportedly struck him anyway.  Vessel 1 claims there was no attempt to avoid the collision by vessel 2 and he explained that he observed the operator of vessel 2 was operating single handed and "forward setting a gail".  After the collision vessel 2 approached and offered a tow but then left the scene without giving any information.

Operator completed Report.
Kemah                         