Weird, it's almost as if you don't read the links I posted. Because if you had you would have read this:
The link again:
https://news.err.ee/1608346988/expe...-we-did-not-seen-signs-of-extraneous-activity
See, while I am not a scientist, I am a Monterey Bay Aquarium Research Institute gadfly due to my love of oceanography. What I posted above is how non-lunatics conduct a scientific survey of what is now an underwater archaeological site. I've seen those sensors since they get tested a short distance from where I'm sitting at the big tank at MBARI.
Looks like they're sampling the currents at that depth to accurately model the undersea stresses the Estonia's hull endures, and the clarity will come in later when they PLAN THE NEXT EXPEDITION TO DIVE. I'll go out on a limb here and suggest that it's more productive to put divers and ROVs down into clearer water than murky water.
Your story indicates that neither team is communicating with one another, and that's a waste of everyone's money, and everyone involved needs to be slapped around in the name of science for being nimrods. Sharing data save everyone time and money.