TL/DR: loose lips haven't currently saved any sunken ships. The remote hope is that, if they disclose the locations of shipwrecks, fishermen might choose to avoid them. They haven't even considered turning their "National Marine Sanctuary" into an actual fishing prohibition area, because of the "anti-regulatory zeitgeist", so the policy is strictly voluntary, and no one is really abiding by it, but for some reason they remain optimistic.

So this is the "deep state" that Republicans want to dismantle? After reading this article, I'm inclined to say they might as well do it, but not because of how dangerous it is - because of how ineffective it is!