At the near end of the previous World War 2, there were some rumors that the United States Navy had intentionally disposed a number of metal boxes containing "Plutonium". This is a type of an element used in building powerful nuclear weapons.
When some investigators attempted to uncover the legitimacy of these boxes, the United States Military claimed that these black coffins were in their possession in the past WW2 but they do not have any record regarding about their current locations. Although, rumors claim that these black coffins were dropped somewhere around the Philippine seas.
Treasure Hunters in Search for the Black Coffins
When it comes to treasure hunting industry, every old objects in the past possess great value today. They are called "Antiques" which are often placed in various auctions for interested bidders. Thus, the black coffins is included in the list of treasure hunters.
However, the US Military has released a statement that they are not giving any kind of rewards to anyone who can find or retrieve these black coffins for them. But despite of "no rewards" offered for the finders, many fisherman in the Philippines often come across strange coffins underwater. Although, not even a single one of the coffins found is the real black coffin.
The only possible means to confirm the authenticity of the lost black coffins is to take their serial numbers and give it to the US Military.
It is actually not advisable to puncture or damage the box. A slight breakage of the box can cause the element to escape out of the box which can cause severe illness from being exposed from the highly toxic radioactive element of the plutonium. Due to this reason, any finders are advised to take the serial number of the coffin by stenciling it underwater.
Moreover, as stated by the US Military that there's no reward, why does anyone would bother to risk their lives just to find these lost black coffins.