I was wondering about that, like every time they were saying they couldn't find anything, they kept pulling back and highlighting the buoys. And they were definitely not just looking in that area, one of them said they kept sweeping back and forth from the shoreline.
I am curious about their technique. They did find a decent amount of items without really using the scooper method and I guess the detector was good enough to ping a few coins, I guess maybe the last two were deeper in the ocean floor. I was thinking that with the tides and shifting sands, it would be tough for production to make sure the coins were still at a detectable depth under the sand, but it looked like the items found were actually just under the rocky layer, so maybe they wouldn't have needed the scooper and just concentrate around the buoy more.