In other words, do we put on the hat, get in the boat, sail, and then take off the hat before disembarking? Since the bonus will be given each time before boarding the boat and saved before disembarking. Or can the player calculate the number of extra moves and stop where they think the remaining movement should end?

It is very important to clarify this... If we TAKE OFF the admiral's hat before disembarking, then after disembarking, our turn will end. This will significantly increase the number of days it takes to complete the map. If, however, the admiral's hat does not need to be removed before disembarking (CAN it be left on??), then can we get extra moves on land later? Yes, but at the same time, you cannot use boots of speed and gloves; I DON'T UNDERSTAND WHY, but I think it's to reduce movement on land after disembarking with the admiral's hat. But if that's the case, even without boots and gloves, after disembarking from the sea with the admiral's hat PLUS navigation, can we still get extra moves on land? Or can we not worry about this here, and if extra moves are obtained, they can be used according to the rules?

And why can't the admiral's hat be used with boots and gloves when boarding and disembarking from the sea? After all, the boots only give extra moves on land and only on the next day...

PS It would be easier to just remove all these restrictions - you can cheat with the moves somehow, and what's so bad about that? ALL PLAYERS ARE IN EQUAL CONDITIONS! Cheat as much as you want...

Added after 4 minutes
With this admiral's hat, I'm already tired of all the nuances, and I just want a DETAILED description of what can and cannot be done, WHY it cannot be done, but no one stubbornly wants to give it or cannot, everything is somehow in fragments... It will be a shame for someone to spend a whole week completing a map and then have the result not counted...