Is there any way to get a ship unstuck from the shore? I was in a battle and ran aground, and now I can't get my boat out. Since the game autosaves after exiting, is there any way to fix this? I've attached a screenshot.

Not sure if you're still stuck, but sometimes I can unstuck myself by turning and sailing backwards (press S.) If not, can you fast travel to a different region then back? The most extreme measure would be to throw an AoE on yourself until your ship dies and respawn somewhere else, but fast travel has always worked for me.

If you use anchor to stop sometimes you get stuck in the "nothing". I can't turn sometimes when I want to turn in one place. But moving forward always help.