What gauges do you need?

[Damselfish]

I think i'm swinging towards getting a Mares Nemo which is not air integrated. I'll definetely need the SPG, but i'm just thinking as a precaution (or something) whether a depth gauge would be good - perhaps just in case???

I like backing up certain things, like my computer for certain reasons. And if I had a hoseless AI computer I would want an analog backup SPG (yeah I know not so hoseless anymore but that's me.)

But I wouldn't worry about backing up a depth gauge. One thing about depth - In the unlikely event your computer failed, you could look at your buddies gauge and get the correct data. You can't do that with a computer or SPG.