A multi-beam echosounder
![An illustration of a multi-beam echosounder](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/2017-08-23_multi-beam-echo-sounder.jpg?itok=3Oaqml3L)
Detailed Description
A multi-beam echosounder pinged the lake floor every 4 seconds and recorded the depth measurements that were used to create the floor map.
Sources/Usage
Public Domain.
A multi-beam echosounder pinged the lake floor every 4 seconds and recorded the depth measurements that were used to create the floor map.
Public Domain.