Soldato
I would have thought the bigger square (right side) would have been an aerial search - just due to the gaps between lanes compared to the other grid searches.
I guess what's hard to fathom is where the titanic sits in respect to these grid searches, and how big of an area is it actually covering. I.e. the first white space outside - is that potentially 100 miles away, or 100 meters.
Yeah I guess without more context, it's all just guess work.