I see where you're coming from. Good points. I was taking it for granted that knowing the location of an unmanned, expendable sonar buoy or probe before you're

I see where you're coming from. Good points. I was taking it for granted that knowing the location of an unmanned, expendable sonar buoy or probe before you're discovered is not tactically important. Now that you have me thinking, it would clearly allow you to stay out of detection range if you had the good fortune for their pings to initiate within your detection range but outside theirs.