Vessel #1 was transmitting inbound in channel, vessel #2 was entering channel from mooring field on starboard side of vessel #1  Operator of vessel #2 did not observe vessel #1 until it was too late to take appropriate action to avoid collision.  Vessel #2 made contact with the starboard side of vessel #1.  Both vessels sustained cracked hulls.  No injuries.  Officer determined that operator of vessel #2 did not give way to vessel #1 or sound it's horn and received a written warning for fail to follow the rules of the road.
Hingham