indeed moder Forsaken Power grants 100% Tailwind, i found the speed of the ship was far faster when the wind hits at 45* angle Crosswind The Brightest Whitest part of the sailing compas means your getting the fastest speed, the modder tailwind is akin to a barely saling INTO the wind with the slight angle to move forward up small canals/rivers

ALso, beware of 45*angle cross winds during an a ocean Storm.... in multiplayer, that max speed weird ♥♥♥♥ can happen, along with ship damage
;)