By using up to the biggest underwater propeller repair aparatus in the world, specially designed for severe bend blades due to ice or impact damage. Damaged propeller blades are straightened completely underwater by using a cold static load press by an FN Diving operations team bringing the blades back as close to their original design possible to restore optimum performance and efficiency of the propeller. These operations are normally done underwater without the ship to ballast the damaged propeller section out of the water, during ship operations, or in a tip ship condition on site avoiding or reducing off hire and down time on a vessel.