Mediterranean Late '41 / Early '42

[Dowly]

How the hell do you get through ? every time I try at night I have to run submerged, soo as I surface to replenish O2 recharge batteries, only get a half hour or so and DD's are in the area, am I getting picked up on radar ?

I went through it in Jan of 1942. Was submerged for the whole run, silent and slow (2-3knts). Surprisingly my oxygen was enough for the whole run. Took around 15-18hrs.

Only got attacked by 3 depth charges.