RealNav on... hit foul weather west of Stavanger, went around the Shetlands and heading down towards St. Kilda...
Haven't seen a blink of stars or sunlight for the past 1400Km..(6 game days) just rain, sleet and heavy seas.
I estimate that I'm just north of Carloway (Outer Hebrides) Having closely missed Rona, I think it is - couldn't see it... Slowed my TC (16x) and sounded my way through with Depth Under Keel coming up to 25m.
All I had to do was shunt my sub up a beach on my first patrol

Visibility is zip most of the time - and every now and then, the watch tells me they can see fog

I just bang my head against the periscope shell.
Navigating to 6 hourly waypoints at max TC=128... but hell's I could be just south of the Faroe Islands the way things are going