Surf competitions involve surfers competing against each other based on the difficulty, speed, power, and flow of their maneuvers. Surfers are judged on individual heats that last 20-35 minutes, where they try to catch the best waves. Judges score each wave based on the surfer's performance and completion of maneuvers. The surfer's two highest scoring heats are combined to determine the overall competition placement and prizes, which can include trophies for local competitions or cash prizes for national and international events.