A center pivot is used for circular transects
![Diver holding a center pivot](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Frame-16-10-2018-01-05-37.jpg?itok=-XDO0R4h)
Detailed Description
A diver is holding onto a pole which is used as a pivot point. A line can be seen that a diver attachs to a camera for running circular transects. Image taken in Lake Michigan near South Manitou Island.
Sources/Usage
Public Domain.