Vertical Inspection Passes

Vertical passes are most efficient in general, and my be better to use when pilings have cross bracing. The ROV is navigated to the piling and a vertical pass is made with the ROV facing the piling. The distance from the ROV to the piling will depend on the water clarity. The camera should be pointed down slightly for vertical passes that are downward, or up slightly for vertical passes that are upward. At the end of the pass, the ROV is navigated circumferentially to get in position for the next pass, again with the ROV facing the piling. The circumferential distance between passes depends on the size of the piling and the water clarity. The next pass is then made in the opposite direction. This pattern is repeated alternating the directions of the vertical passes until full visual coverage of the piling is completed.