Unfortunately, there is no seperate "Send/Enter bearing" option like there was in RL and in SHI. This has been discussed at length in the past in threads where I was involved in. You will either have to re-measure range and send that, or send the outdated range to transmit a new bearing. Luckily, range is the least important of all datas for a firing solution and makes little difference for the torpedo gyro angle, if any (it would severely screw the target speed solution though once people get the magic chronometer from SHIII back and compute speed with that based on an inaccurate range).

OK, I tried 14ft a a large old tanker, both aimed at under the funnel. Good times, good times, can someone sticky the post concerning proper depths for different sized vessels?

Bump/ Did suggested influence depths ever get ironed out? I found a few threads discussing discrepancies between actual ship draft depths and those listed in the manual/chart. The threads/posts weren't real recent though and it would be nice to know if any of this has been fixed via 1.1 or 1.2 or where the issues currently stands...

In real life, some ships refused to sink despite being hit by multiple torpedoes. Check out this story about the Kittanning:
www.uboat.net/about/members/ships_demo.html?shipID=3280

which is pretty much unrealistic and should be adressed. Ive been reading about destroyers hunting a sub for days after attack on a convoi until it surfaced and surrendered due to low oxigen. In real they would never abbandon a damaged ship and leave it to its fortune. More likely they would call another merchant to tow it (i dont expect a patch on this) or if its damaged to much they would evacuate and sink it.

I always stick to the US submarine doctrine: Fire as many torps at one target to insure you hit the target. I know that's not very efficient, but it feels historically correct.:D