Two Questions

Originally Posted by HunterICX

The Triangle is the Angle on Bow indicator

when its Red - Orange : not an good AoB (angel on bow) to shoot
when its yellow - green: good AoB to shoot

No. It is the gyroangle indicator. When the triangle is green, the torpedo will (if at all) barely have to turn to make the shot. Bear in mind, when you press the firing button, the solution is fixed, but your sub and target are still moving, so if the triangle is yellow or orange, that time elapsed will result in a small amount of error in the actual path traveled by the torpedo.

(you can notice this yourself by watching the gyroangle display; as it goes from 355-005 degrees, the triangle will be green, for example. I can't remember what the other values are.)