and refuse to service or refuel US aircraft carriers there. Alternatively we could allow the whole US armada into the Harbour, all the way to Bedford Basin (that can hold a whole armada or five) and then put the anti U-boat nets up across the narrow opening of the Harbour (The Narrows) keeping the US Navy locked away.
https://www.google.com/search?ie=UTF-8&client=ms-android-bell-ca-rvc3&source=android-browser&q=halifax+harbour#ebo=0

Bedford Basin is a large enclosed area for ships to anchor that forms the north-western end of Halifax Harbour in Nova Scotia on Canada's Atlantic coast. The basin had international significance during both the First and Second World Wars when the German navy used submarines as an offensive weapon against Allied shipping. Canada's prominent role in the First World War led to Halifax being chosen as the primary logistic port for resupplying Western Europe. The protected waters of the Bedford Basin allowed the Royal Navy and Royal Canadian Navy to assemble convoys of hundreds of merchant ships in relative security while torpedo nets kept German submarines at bay.
https://www.veterans.gc.ca/en/remembrance/memorials/canada/bedford-basin
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Because if you don't laugh you have to cry.