In case you use your arm on your own, the detector moves similar to a pendulum, mounting off the ground at both conclude with the swing; Therefore, you have readings only in the center in the swing, when the coil approaches the bottom, Hence missing a lot of probable targets. https://metaldetectorperspiaggia76554.ka-blogs.com/82277598/helping-the-others-realize-the-advantages-of-best-underwater-metal-detector