Ships Passing in the Light

 Lots of freighters going along the Seaway this summer.  Many of them are probably shipping grain from last year's bumper crop out on the Prairies.

 The river is quite wide but the ships have to stay in the middle to have enough depth of water.

 The ships pass so close to each other.  Special pilots steer the ships from Quebec City  to Thunder Bay because it is a tricky waterway.

Heading east, possibly on its way to the Atlantic Ocean.