Marine current turbines are being developed to harness energy from strong ocean currents. Researchers conducted experiments and simulations to compare different turbine designs in UK tidal sites. They found that turbines based on wind turbine principles are promising for extracting predictable energy from marine currents. The study focused on a 16m horizontal axis turbine and showed how its performance varied in different flow conditions. This research aims to help optimize turbine designs for efficient energy extraction from marine currents.