davao areas and nearby provinces (davao del norte, comval, and nearby provinces) have sliding cement vault systems based on the experiences of my friends. we have not figured how to defeat the said sliding system until i went bankrupt twice and stopped treasure hunting a long time ago. it always slide when you cant figure out why it slides and creates mini earthquakes and hear the sounds of falling bars. heavy metal bars falling and clashing like heavy metals and numerous of them.
its bad my friend who knows how to defeat the anti detector also left broke and sad. and i never bothered to contact him again. again, i will tell you, when you use metal detectors, all you see are decoys, small rocks that registers like gold. when excavated, you cannot see anything except rocks and other materials that registers as gold.
for real items, they are laden by anti-detector materials. so simple and crude techniques by the japanese that they dont want their items be detected by metal detectors because if all japanese buried items are detectable by metal detectors, a lot of filipinos and foreigner treasure hunters would now be so successful. and yet, you cannot see any single one of them who used metal detectors being able to recover treasures buried by the japanese, exxcept for golds hurriedly buried by japanese soldiers who looted the said gold from their japanese superiors. those items are not laden by anti detector materials.
when you keep on asking yourself why almost anybody cannot recover an item, what does that tell you? simple and crude but very effective. detect all you want with metal detectors and you can detect so many items there at your place, but cannot recover even a single bar from it. sad but true.
