Vessel #1 and vessel #2 were operating in a northerly direction.  Vessel #1 was several boat lengths in front of #2.  Vessel #2 began and completed a slow 180 turn to the left and near the completion of the turn collided with the port bow of vessel 1.  Officer concluded that vessel #2 was operating at a speed reasonable and proper, failed to have a proper lookout and did not make any changes to avoid this collision.  Citations were issued to Operator of vessel #2.
Mashpee