Videre non videri
Join Date: Sep 2004
Location: Gothenburg, Sweden
Bikes: 1 road bike (simple, light), 1 TT bike (could be more aero, could be lighter), 1 all-weather commuter and winter bike, 1 Monark 828E ergometer indoor bike
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The truth is that the depth ratings have little to do with reality.
What they really say is that they are rated for a certain pressure.
The pressure of one atmosphere (1 bar) is equivalent to a water depth of 10 m.
So 50 m equals 5 bar, 100 m equals 10 bar, and 200 m equals 20 bar.
But the actual depths they can be used at are far less than that.
A general guide:
10 m - you can wash your hands with it on without problems
30 m - good enough for a shower
50 m - bathing or swimming at the surface
100 m - shallow dives
+200 m - good enough for scuba diving