Help needed...Speed with time acceleration

[GGLurch]

Now - SHIV was so cheap to buy now - i thought i`ll give it a try.

I installed, patched (1.4) and I am playing my first mission to take a look around.

Well - it works. Occasionally the Jap-Boats blow up by themselfs, not all sunken ships show on the map (but i can see them in the log), the station-managment icons are...well not necessarely selfexplaining...my torpedoes can fly, my boat is behaving (moving) strange at high seas, it rains with no clouds...but i can deal with that.

Btw - compared to SHIII - the japanese sure have a lot of ships cruising around...

However - after bringing in a spy and then go hunting i sunk a couple of ships. After sending a status report - i got assigned to a new hunting ground, went there, got some ships and i am now out of torpedoes. I send a new status report but got no answer. (can i actually see somewhere, that i`ve sent the report and what it contains??) Also the new hunting ground shows up as not fullfilled. I figured - I have to resupply and go back. Now on the way to the next american base my boat is going to a speed of 0 as soon as i set the time acceleration higher than 256 or something. Crew is fine - one shift is sleeping the rest works normally. No damages show up. Fuel is ok (playing easy) and if i am going on normal time it works fine - the speed goes up and holds. Otherwise it drops to zero. Am I missing something?

I work during the day - so i have do not have enough time to travel around at normal time - espacially not for crossing the pacific.

Another question: I came along a pair of ships containg a passenger ship and a large troop transport 3 times now . What are the rules of engagment for the passenger ship? Do i let it go or is it counting?