Today, had strange hydro contacts in the middle of North Sea...
My hydro guy couldn't stop announcing merchants/fast speed/closing...and no fog, no boats!!

Untill i closed that much i saw...THIS:

Was thinking my hydro guy was drunk (again! lol) or my mod list was screwed up because at the hydro station i could hear...no usual propellers, but strange kind of interference...
In fact, hearing with some attention, it was really dolphins noise!
A dozen of dolphins were cruising through North Sea...
This game will never cease to impress me!
Thanks for OHII Full