The wrecks they have located and dived are protected, but if you apply with acceptable reasons to dive you would probably get a permit (depending on their future plans for the site). There are some they know of only by general location - they have not been found. They would automatically be protected but would not need a permit as such as they don't know where they are exactly. It would be of more benefit for the wrecks to be located by concerned divers and notified to the unit (good thing) rather than being stumbled upon by smidge hunters (not a good thing). That said, not an easy task even if you know exactly where the wreck is located.
Tad "who you know" not "what you know".......
