Geographical Genius

So I'm at the post office in good ol' Jersey City on Thursday. I overhear a conversation between a guy in line who has a package going to Canada and the woman behind the counter:

USPS lady: You want airmail?
Guy: Sure. I guess.
USPS lady: OK, that will be seven to ten days.
Guy: OK. How long for the non-airmail option?
USPS lady: Airmail is seven to ten days, the other option is by boat which will take fourteen to twenty days.
Guy: By boat?
USPS lady: Yup.
Guy: By boat?
USPS lady: Yes.
Guy: Um ... Oh ... Kay. Um, I guess I'll go with the airmail.

Boat to Canada? I'm not sure which part of Canada it was going to, but it's odd they wouldn't just drive it or maybe put it on a train. Maybe they go via Erie Canal? Or maybe from Jersey, down through the Panama Canal and back up to Canada? Who's to say? I guess the USPS knows best though.