Maritime improvement

It would be great to have features like ocean current and trade wind to make oversea exploration and naval combat more exciting, realistic and dangerous.  Think abou it, pre-industrial warships are mostly powered by wind, they weren't suppose to move freely without restrictions. With the feature such as trade wind, the wind direction would now have great effect on players naval strategy, how they maneuver will effect the outcome of battle, they will seak weather gage just like they seek highground in land battles. On the other hand this could also creat much interesting events during exploration instead of just constantly and repeatedly moving our naval unit straight to their destination without even look at it.