Howdy deepsound
Here is the scoop on the 'slow and fast' mode on the Tiger Shark. I have had a Tiger Shark ever since they came out with one in 2001, had mine for going on 9 years.The all metal slow is an all metal search mode with a slow threshold retune speed, this is a good mode to pinpoint the target with. The all metal fast is an allmetal search mode with a fast autotune, this mode is best for actual hunting with (though I never use it, prefering the Disc.) because of it's faster threshold retune.
The only time I use the Fast Allmetal mode is when I am ground ballancing the detector. Then after I get a good ground ballance with no fluctuation in the threshold sound using the bobing method, I switch to motion disc. mode and use that mode for the rest of the time. I use the motion disc mode to pinpoint the target, then once I have pinpointed the target, I keep my coil resting motionless in the exact spot that the target is responding to the loudest. Here comes the tricky part, once you have found a good sounding target, keep your coil in that spot over the target. To mark the exact spot, take your left or right foot(whichever is natural for you,whether you are right or left handed) and position your toe up against the back of the searchcoil. Then move the search coil away from your toe, and carefully position your scoop just in front or your toe, step back and dig the target.I don't want to write a book here, but if you have any more questions just PM me.........Hombre