From atop the Lake Superior Maritime Visitor Center in Duluth, these cameras provide one of the most intimate views of Duluth's Aerial Lift Bridge and Shipping Canal. Watch ships from around the world arrive and depart the Twin Ports as they traverse the cold waters of Lake Superior. The cameras are owned and operated by the Corps of Engineers' Lake Superior Maritime Visitor Center with funding from the Lake Superior Marine Museum Association. (technical assistance provided by...
It has been shown that a majority (51%) of pilot ladders is secured by means of D-shackles, when secured at intermediate length. Previous research (Evans, 2020) has proven that this method has only about 50% of the strength of the pilot ladder when secured at full length (“double ended ladder”), or by means of the “endless-sling” method.
