/ Bubble in compass
Last weekend on using my back up compass I noticed a bubble in it. Since then I bought another compass. Both Silva.
Now the bubble has gone from the first compass! How does that happen? Will the bubble return!
I have had this and Silva say if the bubble is small (below 1/4" iirc) it's ok. It's due to atmospheric or temperature changes. Having said that, I always carry a spare compass after once leaving mine sitting on a rock on Skye! :-(
I've had similar issues with silva compasses, again, I had two with me and both had the same problem.
I was also told by silva that it was due to atmospheric pressure and temperature. This would seem to make sense as the bubbles only appear on very cold clear days.
I noticed last weekend for the first time that my Suunto compass has a (very) small bubble - it's around 15 yrs old.
My original compass (inherited off my Dad) had a big bubble and TBH so long as you jiggled it so the needle wasn't resting on the bubble there was no problem with reliability/accuracy
Someone told me the bubble was quite normal, that it allowed for expansion or contraction as temperature changed and avoids the compass bursting - gas being compressible but not liquid.
Elsewhere on the site
The British climbing scene is very exciting at the moment. It is quite clear that as a sport it is developing at a rapid rate and... Read more
2012 saw the release of the beautiful first volume of definitive Yorkshire Gritstone climbing, produced by the YMC with Robin... Read more
Make the most of this months HALF PRICE OFFER on the Five Ten Guide Tennie Mid!! Designed as a hybrid approach and... Read more
Halifax-based John Colton (see his UKC Gallery here) has an art exhibition in Courmayeur, Italy (the Italian side of Mont Blanc)... Read more
The Christmas Gift Guide at Outside.co.uk Check out our top selection of Christmas Gift Ideas for climbers,... Read more