Did a wetsand test today with a bottle cap (corona bottle cap). Next time I will do it with a penny, nickel, and quarter and different depths and modes (give me 2 weeks as I am traveling until then).
On all metal mode in salty wet sand with Disc 0:
At 5.5 inches:
Sensitivity max - easily detect
Sensitivity 3 oclock - easily detect
Sensitivity 12 oclock - could not detect
At 9 inches:
Sensitivity max - easily detect
Sensitivity 3 oclock - could not detect
Sensitivity 12 oclock - could not detect
I also noticed that on wetsand noise/false beeps are easily avoided by moving the coil slow, even at max setting. On 3oclock I could move at a regular pace and avoid pretty much all falses but I know I am limiting my depth there. Now I need to test this with different metals and different depths/modes. I have also realized I need headphones as I couldnt hear all of the beeps this close to the waves. I wonder if I have been walking and just missing beeps haha. Headphones are now on order.