Underwater propeller polishing on oil products tanker

Check it out as this diver polishes a propeller underwater, with fixed blades with a total diameter of seven meters and five blades. The maximum working depth was 14.9 meters at the deepest-reaching blade. A propeller polishing can reduce the fuel consumption by several percents and is a good investment for the owner. Saving money, time and the environment. The extra "propeller" mounted on the boss weakens the hubs vortex and decreases fuel consumption with up to 5%, or an average of 2%. Paying itself off in one year!