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...
The Bollard Pull value, which can be interpreted as the maximum thrust that is developed for a specific amount of time by the propulsion systems of any vessel to the fullest , when it has zero speed in the forward direction, is the criterion that allows us to understand how suitable a tugboat is for a port maneuver or a towing operation.
