Ok i think i have it sussed now. It does not resett after resteering. Nor does it enable at 10000yds from the launching platform if set to enable at 10000yds. What it does do thoug is enable at 10000yds from the origenal launch point
Try this test Amizaur
First set speed to 0kts. Then place a Area circle of 5nm (which is Approx 10000yds) centred on your subs position. Then Place a reange circle on your sub of 5nm also.
Fire a snap shot at 000deg, 90 deg, 180 deg and 270, Oh and have your sub facing 180deg.
Then after you have fired the snap shots spped up to full speed and follow the 180deg torp.
Now once the torps have all travelled say 5000yds stop your sub and goto 0kts. All the torps should still be in booth the circles. Now steer them about for a while keeping them in booth the circles.
As long as they stay in the circles tyhey will not activate. Now steer then to leave the circles.
You will now notice they still dont activate when they leave the range circle that is centred on your sub but will activate when they leave the Area circle that is centred on the origenal launch point.
This means that it uses the origenal launch point to calculate the range traveled and not the actual range traveled.
I sure this was not the way it has always been and i am going to look very silly if it is and is meant that way
Anyhow if it is meant to be like that then it should be changed
Oh and i still have to yet hear the ping rate increass when homing in 1.03.
Fish maybe it only increases in multiplayer? as i cant get it to do it in Single player