I don't have a screenshot, but once all the data is properly inputed into the attack map, the white X shows the projected position of the target and the white line emanating form the X shows its direction. You will also see a black line from your sub that intercepts the white line showing the projected path of your torpedo and the estimated time to impact. I use it all the time during attacks to make sure my solution is properly inputed and makes sense.
Many Supermods remove the white X and line since it gives you too much info with map contacts on, but I play with map contacts off.
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