While the submersible had carried out its underwater mission, the ship had continued its sonar survey along the lake's perimeter.

We've run sonar surveys and sent down our Remote Operated Vehicles.

Problem is, making a thorough sidescan sonar survey of the whole area is quite expensive-you can't just go out and do it on spec.

If, as hoped, diving resumes today, the main focus would be to inspect the backlog of more than 200 targets still remaining from conventional sonar surveys.

In 1988 Bradley conducted a sonar survey of Muskrat Lake in an attempt to find evidence of Mussie's existence.

Dwight F. Coleman of the Institute for Exploration served as the expedition's chief scientist, focusing on targets identified the previous season in a sonar survey.

High-resolution multi-beam sonar surveys in 2005 and September 2006 found that there had been no recent significant movement of the wreck.

Dr. Moeller said the stones should not be put in place on Plum Island until sonar surveys for archaeological sites were made.

On a chart displaying various sonar surveys completed so far, Admiral Kristensen pointed out today how some areas of the crash site have been scanned five times or more.

Through research and a through sonar survey, SOMAP was able to determine the status of the SS Hispania.