You have 15 minutes to row 1000m on a C2 rower and then with the remaining time find your one rep max ground to overhead. Your score is your row time (in seconds) minus the weight (in kg) you lifted. 
You can have as many attempts at the ground to overhead as possible, but only your best complete rep counts. The bar must start from the ground and must finish overhead with feet inside hip width, knees locked, hips open, elbows locked and ears in front of arms. The weight must be controlled. You can snatch, power snatch, squat clean and jerk, power clean and jerk, push-press, push jerk, split jerk etc.