On 7/11/2009, at approximately 1700 hours, Unit #1 operated by subject 1  was in motion at idle speed along the shoal at Ebenezer Park heading WSW towards Ebenezer Park. Unit #2, operated by subject 2, was on plane headed NW towards Ebenezer Park area at a rate of approximately 20 mph. Unit #2 was faced with a crossing situation by a powered vessel approaching on her starboard. Unit #2 failed to give way to Unit #1 (stared on vessel) in this crossing situation. Per US Coast Guard inland Navigation rules, when a vessel is faced with a crossing situation, and the crossing vessel is on her starboard, the vessel must give way to the vessel crossing on her starboard. This can be found in 33 CFR 89 amd 33 CFR 90 under rule 15 of inland navigation rules. Failing to give way to unti #1, Unit #2 collided with Unit #1 on her front port hull. Unit #2 struck Unit #1 with her starboard front hull. Unit #1 sustained about $3000 worth of damage with a hole and severe stress cracks on the front port hull. Unit #2 sustained minimal damage (less than $1000) to the starboard front hull.