I sorry you are all wrong.
Current can flow in multiple directions.
When I anchor in the Brisbane river and the tide is coming in the current flows up stream. at slack water the current stops, and when the tide is going out the current flows down stream.
With a bit of concentration, I am sure you will get it
Sorry if anybody is offended, but its on a number plate, so must be OK then. Wished I had thought of it first.
Not funny? Well it put a big grin on my face today when I realised I now have the perfect excuse to buy some new gear