I don’t know the triggers because TWoS changes things around. I will have to dive into the files and see what it is. One thing is for certain 1000 m is short range anything from 1000 to 3000 m is medium 3000 out of anywhere else is long. I still use 20 km as the limit to the hydrophone operators range to hear. It may be wrong but it gives you a clue.
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