Very good start. A few misspellings/typos that should be cleaned up.
One rule worth mentioning is that during action marker placement, a market cannot be placed if at that moment it is impossible for a player to take that action. Example of being unable to put markers on the Fish action unless either your ship is on a hex with fish on it or you already have action markers on the Sail action.
This is non-obvious and easy to miss.
I figure it will need some clean ups so thanks for the comments. We missed that rule you mention in our first play, but to be honest, it seems a little more trouble than it may be worth. I had a hard enough time figuring out what I needed to do, let alone keeping an eye on whether a player can actually perform the action they are selecting . We also missed the part about having to perform an action if you can (a few people chose not to sail even though they could).