To sail, double click anywhere you want to go. On the bottom left of the screen, you will see the amount of time it will take to get to your destination.
You can also access the view of the whole map. Click on the “explore new seas” on the left hand of the screen.
On this map, you can either double click and sail to your destination or enter the coordinates on the bottom left of the screen.
The top left box shows your current coordinates. You can share them with your friends and meet up.