there is also another thing...
using SDBDM there is
Ktl KUrtz`s BritishAsdicMkI v1.02K integrated, he managed to create a ping sound which is changing by intensity... means if you have a good sound system and of course clean ears
, youre maybe able to hear that tiny pebble stone effect which is telling you, this ping have very high energy and returns for shure to its sender.