In English, it's called a depth gauge (proper), or depth meter (the folksy version). The dictionary also has depth finder, but I haven't seen that on the net.
An analog depth gauge for diving costs $12.
But I need a digital one, with memory. And not just with memory, but with automatic recording of the maximum dive depth. Yet on sale there are either super-tricked-out dive computers for $150 minimum, or equally tricked-out watches with a depth gauge by CITIZEN/CASIO.
Found some TIMEX HELIX D_M - they fit the bill on almost all counts. The price is good, the features are fine too, and only the looks are a bit on the ugly side. But bummer - they stopped making them 2 years ago. And the manufacturer's website recommends buying a citizen for $150. Yet just a year ago you could buy these TIMEX D_Ms at walmart (a supermarket for average joes) on clearance sale (selling off junk) for $20. And now they've become a rarity, going for $50 minimum on eBay - a bit much for a Chinese knock-off. So there's your freaking globalization - there used to be a useful and inexpensive thing. And now tough luck - fork over the cash for the empty beauties of Citizen. You inevitably start wondering: maybe the anti-globalists and anarchists are right about something?
TIMEX HELIX D_M
Citizen
Now here's a citizen with a depth gauge function going for a mere $15 right now. But there are still 5 days until the end of the auction, by which time they'll surely end up costing a full 100.
So I guess I'll have to dive into the unknown.
P.S.
Why does my dog, right before going for a walk, absolutely have to run to his bowl to finish off the leftover food, if there's any there? Is he really stocking up before the outing?