Where is the largest dry dock located on Lake Ontario?

The largest dry dock on Lake Ontario is located at Port Weller in the Welland Canal. This dry dock is crucial for ship maintenance and repairs, accommodating a variety of vessels that navigate the Great Lakes. The strategic location of Port Weller allows it to serve as a pivotal hub for maritime operations, particularly for ships traveling between the smaller Great Lakes and the larger St. Lawrence Seaway.

In this context, other options may contain notable dry docks or ship facilities, but none match the size and capacity of the facility at Port Weller. For example, Toronto Harbour is known for its commercial shipping and passenger ferries but does not host the largest dry dock. Similarly, while Rochester Dockyards and Oswego Port are significant marine locations, they do not surpass Port Weller in terms of dry dock size. This understanding highlights the importance of Port Weller as a key player in the marine industry on Lake Ontario.