From the August 27, 2015, Masdaq-1 Coda Octopus group, Inc. "U.S. Navy uses the Echoscope 3D real-time imaging sonar during CSS Georgia salvage."
The Navy divers encountered great difficulty finding objects in the murky Savannah River waters where the CSS Georgia's wreck is located.
"The Echoscope 3D imaging system displays in real-time 3D underwater objects as they are scanned, whether they are static structures or moving objects. The image supplied can be rotated in all three dimensions and measurements can be taken while viewing the data."
Not exactly sure what all this means, but anything is good if it helps.