For these special sites, think of a huge column or tube centred on the site on the lake or river bed. The tube is 1000 metres wide and extends from the bottom to the water's surface. Within the tube you can’t dive or operate any kind of submersible vehicle; you also can’t use any kind of device capable of surveying or mapping the site — from below or on the water’s surface.
|USS Scourge, originally the Canadian schooner Lord Nelson|
|Sidescan sonar of the Hamilton on the lakebed Courtesy City of Hamilton|
|A drawing of the relative positions of the wreck parts|
|The figurehead on the bow of the Hamilton Courtesy City of Hamilton|
Note 1: See Ontario Regulation 11/06 under the OHA. For obvious reasons the regulation pinpoints the location of the sites. For example, the Hamilton and Scourge site "is comprised of the water and land under water in Lake Ontario at the point of intersection of the meridian of longitude 79°18.57' west with the parallel of latitude 43°18.43' north." This means that for legal purposes the sites are effectively vertical "lines" rather than "points", extending from the lake bed to the lake surface.