Last night I was playing, ( SH3 1.4 GWX 2.1, No other mods) December, 1940 patrolling the BF grids south of Ireland. This is before radar. I was time compressing at 512 when suddenly the TC drops to 8, just like it does when you have a contact updated in the vinicity. I check the nav map but no contact is updated. Weather is perfectly clear, and the sea is as flat as a sheet of glass.
The Watch tower is up at full effiency, I ask the WO for the nearest visible contact. No visible contacts. So I bump the TC back up to 512 and immidiately the WO screams "were under attack" As soon as I go to the bridge as shell grazes the conning tower. I check the nav map there are no ships in the vinicity, I ask the WO again, "no visible contacts" again. WTF im going. So I crah dive down to 150 meters and what happened was a Lone Flower Corvette was firing at me from beyond the horizion, like 8km away.
I rigged for silent running and evaded him from there. He couldn't ping me but was just gusssing where I was and dropped DCS at random. I discovered that he was running a screen for a passing convoy, he was covering the extreme flank of it.
I surfaced when safe, plotted a course and intercepted the convoy. I was in a good position ahead of it but was dectected by the lead escort. It wasn't by periscope spotting either. So I had to dive deep and had to abort the attack to survive.
My whole point to this is, I understand that crazy things happen when running under TC
