Here’s a deep nighthawk hole on the hoard field in 2014. The “illusory truth effect” dictates that when people hear a false statement multiple times they perceive it as true even when they are told it is false. Consequently, if you repeatedly hear that the original searches using Ebex 420H and other machines of the time were adequate and you disbelieve us when we say they weren’t, we suggest you ask yourself whether detectors reaching down a maximum of 30cm in 2009 and 2012  were as good as modern ones which can reach 85cm.