Try and row a perfect 250/200 meters (scale to 200/150m)
5 touch and go Power Snatches after each frame (75/55)
However many meters over or under you get is your score for that frame (example: I rowled a 204 so my score is 4)
If on the last frame you row a perfect 250/200m you get to go again and try and replace one of your bad scores. Roll another perfect frame? Go one more time! Lowest score wins!