Disconnect Stopwatch from a running torpedo?

[kevinsue]

Would it be possible to make the stopwatch cancel the "time to impact" of a running torpedo when the stop/start timer button is pressed? The reason being that if that torpedo has missed the target, the stopwatch is locked to that torpedo for the duration of its run which can be a long time if the speed was set to slow, and is therefore unavailable for any further target speed calculations. Makes life difficult because most often the torpedo wake has been spotted and the target starts to manoeuvre and alter speed and TDC settings have to be recalculated.