When AHI is engaged, the towed body must be recovered to keep zone or what height above bottom?

When the AHI (Acoustic Holographic Imaging) system is engaged, it is essential to maintain the towed body at a specific height above the bottom to ensure effective data acquisition and avoid interference from the seafloor. The appropriate height is critical for both the quality of the imaging data and the safety of the equipment.

Maintaining the towed body at 100 feet above the bottom serves several purposes. This height helps avoid collisions with underwater obstacles, ensures that the imaging equipment operates optimally, and minimizes any unwanted interaction with the seafloor that could distort the data being gathered. Although there may be other heights that are considered safe or practical, 100 feet is generally recognized as the standard height that optimizes the operation of the AHI system while enhancing data quality.

This understanding supports not only operational guidelines but also best practices for safely conducting surveys and inspections in underwater environments.