[razark]

I use TMO myself, so I'm not absolutely certain. There should be keys set up to cycle through the tubes. When conducting an attack, I go through and open each tube, and set speed and depth. I usually do this once I've identified the target and am moving into position to fire. Once you are in position, you fire 1, cycle tubes, fire two, cycle tubes, fire 3, etc. until you've launched as many as you want.

There should also be a key to make the watch go away. I'm not sure about RFB's key mapping, though. Looking in my RFB install, there's a "RFB Key Command Changes.doc". Check in there.

Edit:
Ctrl+Enter- fire torpedo
W- cycle torpedo tube
Q- open/close tube

I know in TMO, X brings up and dismisses the watch.