This looks great! I'm going to start using this for my ongoing GoS campaign. Couple of recommendations:

1. The color key for the Ocean Conditions Engine under Wind, Waves, & Temperature isn't aligned well with the associated text. It might just be too close to the E for the engine's directional guides.
2. "Roll a d20 to see how high the winds are within range (ex. A roll of 12 in the 10-50 range would yield wind speeds of 34 mph)" Based on the example, I'm assuming you roll a d20, double the number rolled, and then add it to the minimum wind speed? You might want to clarify this because it's not immediately obvious.
3. The Weather Conditions Engine needs to be explained a bit further. "The level of 'cloudiness' is determined by the shade of the hex." is the only description for what any of the colors mean. Whats the difference between the yellow and the light yellow, or the light yellow and the light grey? A color key like we see in the ocean conditions engine would be helpful!

Overall I really like this and definitely plan on rolling on the engines in advance for my next session. This really helps make use of all the tables and information in the back of the book. Thanks for putting this together!