Abstract: Submerged harbor structures ought to be examined routinely for security issue. Regular review strategies which are performed by jumpers have a few constraints including security and medical issue of jumpers. This study presents improvement of a ROV and test comes about for visual assessment of harbor structures. The ROV is outfitted with visual frameworks for investigation errands, route framework and thrusters. The ROV is worked physically to way to deal with target structures and gets superb pictures for investigation. A bowl test and an ocean trial were directed to check the execution of created ROV.