I partially disagree because I have seen lrl working (no from me naturally). I know persons that found objects with lrl. At my opinion the problem with lrl is that they are not reliably. A metal detector with anyone of operator if it passes above a metal will give us a sound notice. Lrl they want experience, perhaps suitable person and they don't locate always what we want. I will remember you of course also the cases where when they detect rocks and rust they remember they are activated. In general lines I would say that they work but they are not reliable as for the object of detection (neither that will detect a object 100%, maybe 10....20%)
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Geo
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