| Imported post
I have an Uwatec depth timer and an Apeks analogue depth gauge. On reviewing (honest. I did read them the first time. A bit) the instructions for the Uwatec it states that it gives depth in fresh water; so that if I dive in the sea the gauge will read deeper than I actually am. Now that I think I understand, as salt water being presumably denser than fresh the water column will be heavier at a given depth than fresh water. What I was wondering was, is that an industry standard? So if I dived to 'x' metres in the sea off, say, Oz, using a locally hired gauge, it would still be giving me metres of fresh water? And consequently, if I become a tech diver and dive in the sea to '70' metres, I won't actually be 70 metres down? But if I did the same in Dorothea I would be? Does this matter? And should I be concerned that my Apeks gauge is reading significantly (>10%) shallower than my depth timer (yes I'm being conservative and working off the deeper reading; but I'd like to know...)? Thanks for your comments, Paul  |