I thought abandoned / destroyed ships in international waters were essentially fair game for salvage. What laws would even apply there? From the article: "Sunk

I thought abandoned / destroyed ships in international waters were essentially fair game for salvage. What laws would even apply there? From the article: "Sunken warships remain the property of their country of origin regardless of where they are found. Laws regarding their stewardship vary a little from nation to nation, but in general, the ships—and everything on or in them—belong to that country’s navy."