Having a deleterious effect on the crew for cruising in high seas would be a nice thing to model in SH5.

I hope they implement this time a better weather-engine than in SH3/4, there where such only one cloud texture for scattered cloud covering and one for overcast skies, not more.

SH2 even had a better weather-engine, there were several textures for Cirrus-, Cumulus-, Stratos-clouds and overcast skies. These textures were combined by a weather script in multiple layers and one could be scripting dynamic moving weather fronts for campaign missions. But the weather system was to complex for the graphic card generation at that time, the creators of campaigns were not been able to exploit to the full extent of the weather without drastically decrease of the framerate. But today with modern graphic cards this should not be a major problem. Real Environment X in combination with Active Sky Advanced for FSX shows it works.

Little bit offtopic maybe, but I`d like to have permanent weather report (or just only when weather changes) let`s say every 3-4 hours (you could turn it on/off).
Would be nice if you are timeaccelerating 1024x+ stormy and foggy weather to know exactly when bad weather ends.

Oh yes... a credible weather system or ever you go...like you said it will BE A MUST! :yeah:
And another thing wich i will enjoy to see in the SH5...its the famous Atlantic Hurricanes, big storms and waves...hiting the U-Boot...

Now, it may just be that they have an Artist on Board, but I saw multilayered clouds in at least a few screenies (cumulus at c. 10,000 feet cirrus at 30,000). Now if they just add in the planets too...