Your longest time evading destroyers.
 

Just beat my record of 6 hours, 18, year is 1944, beat that :P

3h 30min (real time) of pure terror and total psychological war.:-?

After submerged daytime attack against a convoy in BF13 where depth was about 70-80 meters. Some five to seven hours can't no for sure because I don't keep track. Next time I will.

U-boat took some very serious damage.

I guess 8 hours or so, on standard SH3. Was in 90m waters, one torpedo and 1/2 batteries vs 4 destroyers. I played a trick for entire day: crash dive, when they launch their deep charges I blow the ballast to about 30m and the charges detonate too deep.

until now I was lucky!
been only chased for 3 and a half hours approximately, that happened in early 1940 east of Dundee in very shallow water (70m I guess).

(now in 1941 my technique of evading DDs is much better and I have a big friend: depth!) :D

I've never had that much spare time to play the bleedin game :DL

It's always same deal when sailing out from french ports. Radio report received: enemy large convoy BF something blaa blaa...
MUST ATTACK!

Hits scored, L.I take us deep, dept under keel 70 m. Damn.

Depths lower than 120m means those escorts just don't want to give up.