AZK-7M.

This is coolbert:

Honestly, I had this sort of thing had gone the way of the dodo!

Sound ranging counter-battery artillery location.

But no, the concept is alive and well apparently.

Russian AZK-7M. Automatic sound ranging system 1B33M.

https://en.wikipedia.org/wiki/Artillery_sound_ranging

A solution to the problem of finding and locating enemy indirect artillery batteries for counter-fire a problem without a solution during the Great War [WW1] until the development of a work-able sound ranging system.  

THE PROCESS NOW TOTALLY AUTOMATED BUT USING THE SAME BASIC CONCEPT AS WAS DONE IN WW1. 

"The AZK-7M automatic sound ranging system is intended to locate [enemy] artillery batteries (guns) and mortars from the sound of gunfire and adjust friendly artillery fire from the sound of shell bursts."

"The system provides: search, direction finding and position-finding of the acoustic signal sources in a given zone of surveillance; display of the surveillance results on the monitor of the system commander’s workstation; transmission of the surveillance information to higher authorities over radio and wired links."

See this you tube video how the process was done in World War One. See addtionally at this web site a description of the same apparatus and system, the process innovative and producing good results.

"The AZK-7M [Russian] consists of one central point (CP) and three base points (BP). Its equipment is installed in four Ural-43203 trucks having special K2.4322M van bodies. Three vehicles accommodate equipment of the base points and one vehicle houses the central point."

Counter-battery/counter-mortar radars I  had thought done away for all time with the sound ranging system. Those radars of course subject to * jamming * destruction by anti-radiation missiles.

When the modern way gone, rely on the old way then? As I have said, sometimes the ancient and venerable methods of waging war the best!

The devoted reader to the blog will have to make their own decision.

coolbert.