"Right now, a total of about 250 commercial vessels, of all types, traverse the ocean waters each month. "
These three amateur "journalists" can't even write basic facts accurately.
The Vancouver Fraser Port Authority reports 3,105 foreign commercial vessels, of which 248 were tankers, entered Port Authority waters in 2016.  Why couldn't they write that?
The rest of this article is similarly third-rate, mediocre, inaccurate, unimaginative, uninspired, and incomplete reporting that has been repeated over and over in many other places, as is typical of work from these three "journalists".  Overall, a very sad effort from a team of three "professionals" that would get a C-minus, at best, in journalism school with the comments "Page filler!" in red all over it.