Can fog and rain help against surface vessels like it can against aircraft?

[Synthfg]

Running around on the surface in the middle of a convoy in 1941 with 350m max vis,
Knowing there is a big warship and several escorts in there, somewhere,
Some of the best fun I've had with the game

Right up to the point where the large shaddow ahead turned out to be a Southampton class that saw me the same time I did him