There is a minimap available if you use the sextant and complete the easy mini game. If the perks are maxed out for the Sextant the buff will give you over 75 minutes of the buff which provides a minimap, compass, it also will tell you the ships heading in degrees and speed in knots. The sextant is crafted in the Seamanship tree as are the perks that extend the time of the buff and minigame.