Last week, whilst in a certain German discount supermarket, I decided to pick up a sure-fire "Hey, this'll be GREAT for the RIB!!!" bargain. . .a "ski watch" with the intention of using it as a supplementary, wrist-borne source of infinite vital information whilst conquering the seas.
Yip, it has an electronic compass with bearing, but needs to be held perfectly horizontal to get a reading. And, yip, it has a temperature gauge, but is inaccurate next to the skin/planet. And there's the barometer with an eight hour lead-in time to generate a prediction. Oh yes, and it DOES actually calculate speed, but only in relation to changes in its inbuilt ALTIMETER reading, ie vertical speed.
And to top it all? Nowhere on the case, back, box or instructions are the words "water" or "proof". . .