The coil is superior to a standard coil in depth by 5%-30% (depending on the model of the metal detector) and in ground coverage of between 25%-50% (depending on the model of the metal detector)

2) place expansion cone back on the wooden base

Vibra Tector 740

which is exactly what you want on a dive

making this a smart choice for challenging ground conditions

Gary Drayton: Hardcore Beach Hunting 26.7 inch The coil is superior toGary Drayton pulls no punches in this advanced guide to beach metal detecting. This isn't another beginner's manual it's 96 pages of hardcore techniques that separate the weekend warriors from the serious treasure hunters who consistently find gold and silver. What You'll Learn Storm chasing strategies timing your hunts for maximum recovery potential Defeat iron masking find targets other detectorists miss in trashy areas Stealthy beach hunting stay