Future generations?

The top two silver coins are from the Wreck of Hollandia 1743. (Not salvaged by me)  The lower two copper coins were salvaged by me from the Wreck of the Bassenthwaite 1836.  These are a couple of examples of how stupid the British Heritage authorities current no take policy is. (even though they do it all the time)  They have this ill thought out policy that everything on shipwrecks should remain on the sea bed for future generations to enjoy.  But if you look at the image you can clearly see the deterioration occurring.  When items land on the sea bed they immediately start to deteriorate, that is a fact. If they get buried in an anaerobic environment they are better preserved but even in that environment the deterioration is just slowed down.  Metal objects like coins only survive for any length of time if they are either concreted in big heaps- or become concreted to iron objects. Coins in these two situations deteriorate too though -just more slowly. The outer coins in a heap just act like an anode for those deeper inside the heap. So the longer they stay on the sea bed then more of them will become exposed to the deterioration on the outer layer- until the middle of a heap is reached-thus eventually all the heap will inevitably disappear in time. 

If a coin or metal object is concreted to an iron object like, say, a cannon, then the cannon becomes the anode for the coin. Eventually the cannon gets softer and softer inside its concretion-until eventually- the cannon turns to mush inside its own concretion and thus all its integrity as a solid object is lost. Once that occurs all that is left is the sea bed concretion itself in the shape of a cannon with the coin stuck inside the remaining crust layer. Now without the iron as its anode- the coin becomes exposed to more rapid deterioration-especially if the concretion will eventually become dispersed by the actions of the sea and sea bed material movement.  This happens to everything on the sea floor in time- especially around very violent sea places like Cornwall and here at Scilly. 

The coins in the image above both survived in little heaps. The good coins shown were just deeper inside that heap when found. The worn thinner coins were to the outer of those heaps and thus acting as the anode for those further inside-which is why they are in such a sorry state. But all in the heap eventually suffer the exact same fate in time. So will someone please tell me how this is leaving it all to future generations? Its a myth created by university students now sitting behind a desk who no nothing of the sea. They did a course in marine archaeology then got a nice little desk job where they come up with rubbish ill thought out policies that sound great!- but are totally impractical.   

The good news for the treasure hunter today- is that some good coins still exist as not enough time has passed yet to destroy all. All the treasure hunter has to do is find where the anode coins loose on the sea bed are -and look carefully at the sea bed below where they lay. If he is lucky, that is where he will find the concreted heap of more coins looking like the surrounding sea bed & or bedrock. Many people would pick up the odd anode coins and not realise what is right there by them.  It takes a trained eye with the knowledge above to know and see whats hidden there to find.  My advice is if its legal to do so  then get it all up- because if left there it will inevitably be lost in time until no one gets to enjoy it.  This 'leave down there' policy they currently have- may work in brackish waters like the black sea or the Baltic but its of no use off  Englands coastline where the sea bed is granite or sand and the sea often violent.