How to inspect damage beneath Bismarck's wreck

Could lidar scan through mud beneath Bismarck's hull?

Not lidar, but specialized side-looking or sub-bottom sonar mounted on a deep-sea vehicle might reveal buried damage.

Water and sediment defeat the optical approach implied by lidar. A sonar array carried close to the wreck by a deep-sea UUV offers a better method. Side-looking or sub-bottom acoustic equipment could investigate the buried hull without physically excavating it. The practical obstacle is the expense of operating specialized sensors and vehicles at Bismarck's depth.