What is the primary limitation of photo bathymetry?

The primary limitation of photo bathymetry is closely related to the camera focal length. In this context, the coverage limit imposed by the camera's focal length affects how deep the camera can capture accurate information from the water column. This technique relies on capturing images of the seabed from above the water surface, and if the focal length is insufficient, it can hinder the ability to resolve underwater features clearly, particularly in deeper water environments. The area that can be accurately surveyed also depends on the resolution of the camera, which is directly influenced by its specifications.

While weather conditions can impact photo bathymetry, particularly in terms of visibility and light conditions, many photographic techniques can still work under a range of conditions, albeit with decreased effectiveness. Operating costs are typically lower than some alternative methods, like multibeam sonar. Lastly, photo bathymetry is not inherently limited to deep waters; in fact, it is more suitable for shallower areas where light penetration allows for effective image capture of the seabed.