Ship's book and target selection?

[KeybdFlyer]

That targeting information appears on the book images when you are at a close range to the vessel. I think it appears at less than 1000yds and within 15° gyro angle. Something like that anyway. I seem to recall somebody saying that you can also click on the boxes and the torpedo running-depth will be set for you, though I don't know if that's true or not.