When searching small bodies of water, such as retention ponds and quarries, or to do a quick scan at a boat ramp, we are using a custom remote operated sonar search boat, also with Garmin Sidescan and Livescope that I developed. We found the Chevy Lumina with this boat. It's been a true game changer in our search efforts for Nancy.
Quickly deployed from the back of a pickup of SUV with complete control of the boat and sonar from shore out to 600ft.
Then we have plenty of tools to access what we find below.
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Just wanted to give people a sense of what technology is being used in the search for Nancy.