Good of you to admit you don't know the speed of the SeaSearcher or how long it would take to scan a site. I haven't seen where Seafarer described the SeaSearcher as a device to discover random unknown shipwrecks. It appears to me that it is made more for finding and pinpointing treasure on existing shipwreck sites.
From their website:
But if there is an area where a ship is known to have gone down I would think it could be used to determine the presence of and locate the treasure on that site without having to find the wreck itself although that would seem inevitable. How they use it will be up to Seafarer but there is a lot of potential for very profitable use.
Are you saying there are no known wreck sites that need to be explored to locate the treasure? Are you avoiding that question for a reason?
The professional comment was apparently a little out of your cognitive jurisdiction.