[GeronL]

I saw small tankers for sale on Alibaba.

There is also a giant ore ship that works between Brazil and China, it is too big for the Panama Canal, so China wants to build another canal through Costa Rica.

[thackney]

Panama is already expanding the canal for larger ships.

http://www.pancanal.com/eng/expansion/

I don’t see a Costa Rica canal as economically feasible. A Nicaragua Canal has been proposed but will struggle to have successful economics with the Panama expansion. Of course they have been trying to make the economics work since the early 1800s.