I think you could bet the farm that the guys involved did not have any fancy equipment hanging from helicopters in Burma.
The most common form of Ground Penetrating Radar and the most likely to be used, IF it ever was, is the push trolley style widely used by archeologists to seek out ancient structures. The same style equipment is used by companies looking for power and pipe lines, various rock strata, voids such as sink-holes or old mines and wells.
The display is highly subject to professional interpretation - there is no "picture" like airborne radar or underwater sonar and the average person would have no chance of identifying anything.
Interesting subject to Google if you have a spare moment.
Lang
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