1.6.1  Set the Region Coverage

If you have not determined the Transect spacing for region, review the Define the Search Parameters section for more information and recommendations.

To set the region coverage, right-click on the region and select Set Coverage.

• The recommended Coverage Pattern is always "Mow." The other patterns are not suitable for ROV work.

• The Transect Angle (pattern orientation) can be set to the desired angle.

  Traversing a region is usually best done in the long dimension rather than the short one to minimize the number of turns required.

• The Transect Spacing can be set as desired. The spacing should allow overlap and not exceed the visible or sonar range. Using the anticipated sonar range provides adequate overlap of about 25%. Sonar targets outside of the center 50% of the image in the corners as not visible for as long as targets that are centrally located within the image. Without sufficient overlap, targets in the corners may be easily missed.

• After making the desired selections, click on the Add Coverage button.

• If you are not satisfied with the coverage, you can right-click on the region and select Set Coverage again without having to delete the existing coverage. The original coverage will be deleted automatically and replaced with the new coverage.