I marked them all either after the practice race or the first race that was cancelled due to light winds. I just happened to sail past them all.
A: N38° 44' 27.71'' W076° 31' 58.62''
B: N38° 45' 27.47'' W076° 31' 39.54''
C: N38° 45' 30.13'' W076° 30' 19.80''
Not sure if my gps is whacky but I logged it off the boats as well as my tablet.
Apologize for the format. That's the format Orca takes.