Member, container ships don't anchor. They are scheduled wonderfully to be in the port, because it's a very economic penalty for them to be hovering on anchor.
The main ships are coal and, if you can believe it, Canada is still allowing the export of thermal coal. A lot of it is being mined in the United States. Washington, Oregon and California prohibit it due to environmental concerns, yet we're still bringing it up on trains and shipping it out. There are a lot of ships arriving very early to pick up thermal coal, which we all know is a huge contributor to climate change.
The grain can't be loaded in the rain in Vancouver yet. That makes vessels sit idle at anchorages, and the prairie grain farmers don't get paid. They can't ship their product. Improve that and get rid of thermal coal, and you're a long way on your way towards elimination.