I have now spent quite a few hours on the beach with the Deus using the so called Gold Field/all metal mode ,which to my surprise works extremely well ,to understand the all metal (Gold Field) preset, Google XP V3 manual and read the relevant section ,you find there's a bit about IAR discrimination ,I used the large coil and found it works very well and also the standard 9 inch was fine .
You get a VDI read out on the conductivity ,same as in any other discriminatory preset program and you can change the Frequency if you so wish, there is a constant tone in all metal/gold field which you can alter the pitch ,the good targets come through low tone and the iron high ,, bit disconcerting ,, but if you have a high discrimination program next to Gold Field, just flick on to to it to check if the target is iron ,trial and error here .
But it does work well,, as good as a CTX or any Minelab in all metal mode , now I could be wrong but all metal mode on Sovereigns and all FBS and BBS would be a single frequency

I stand to be corrected ,, if you hunt in all metal as quite a few do on wet beach and then switch to discrim ,similar process as discribed
when using the Deus.
Ok you can submerge the Deus coil but you will loose the radio link in about three inches of water, this will apply to salt or fresh water ,, if you use the remote on a CTX then submerge the machine you loose the radio link, dont you!!! so you have to use wired head phones ,If you look at the Deus V/3 manual under accessories there's a wave guide antenna that you attach to the coil and then run it up the shaft of the detector , you could make it your self , but there's some kind of formula , forget what its called , which gives you the right amount of copper core to be exposed , the antenna is coaxial ..making the Deus controller waterproof is easy Iphone waterproof bag the length of the antenna is not crucial which means you could easily wade up to your chest if you wanted ....