RedactedNarrative: Operator was on the Charles River in a very congested area where MIT was sailing at the time about 30 sail boats.  He was operating between 2 sailboats.  According to operator's father who filled out the form, one of the sailboats turned into his vessel causing damage to hull.  Vessel was not running and this point and operator could not get it started.  About 35 mins later father's friend arrived and was able to tow the vessel away from the sailboats in area.  Investigating officer met with father whose son was operating without a required safety certificate and was issued a citation.  Office also determined that vessel #1 was at fault for this accident and was operating in a unsafe manner and steered into the sailboat causing extensive damage to the sailboat's starboard side of the hull and to his vessel.  Operator of vessel #2 was injured when vessel #1 struck vessel #2.