Ship fast travel points ac valhalla?

I play Assassin's Creed Valhalla on the Ps4. There are fast travel points as viewpoints and there are fast travel points as ship fast travel, these are marked with an anchor on the map (mainly on rivers). I keep finding more speed trips so I wanted to ask if there's a map where all the speed trips are shown or if I really have to travel every river in England.

The anchor points (fast travel points for ships) should be clearly visible here

Source:

https://www.powerpyx.com/assassins-creed-valhalla-full-world-map/