Nice to see so many new posters here all of a sudden, we need new blood as they say. So with that out of the way, I would like to be among the first to give you a hearty welcome to the Oak Island Treasure web site forum.
Yes, ground penetrating radar has been proposed and indeed, used on Oak Island by a retired U.S Army Colonel, H.A. Gardiner back in the last Part of the 1940's. His equipment was finicky and he did not accomplish much other than to infuriate Frederick Blair who owned the Treasure Trove Licence. Gilbert Heddon allowed Gardiner to do the work without so much as telling him about it. The cork really came off of the bottle when Blair further learned that Heddon sold his portion of Oak Island to Gardiner on a payment plan. Unfortunately, Gardiner died and the land reverted back to Heddon.
From what I have been told by those who have looked into this engineering, recent advancements have made this technology worth looking into. I have also been told that the depth that has to be searched is on the edge of radar capabilities and couple that with the debris in certain areas, they may well be better off giving that idea the heave ho. A more educated person in this area, may be able to give you better information than I.
Wow, you either hit the nail on the head with the last part of your first posting, or, you are fishing
. They have done some scanning (multibeam bathymetry mapping)of the bottom off of Oak Island and they have found man made debris and what has been described as a shipwreck. The shipwreck has not been located accurately, and to date, no ne has been diving on it to determine what it is. There is no doubt that it is a shipwreck too, the scientist who made the observation is not prone to making off handed, inaccurate remarks.