The survival curve does not lie: when you are overwhelmed by an avalanche, if you are rescued within the first 18 minutes you have a 90% chance of surviving; over this time the percentage drops drastically up to 25% after 45 '. All this considering the best possible conditions, that is to be dressed appropriately, know what to do and find snow of such consistency that you can breathe at least a little. But what to do if you are overwhelmed by an avalanche? And how to avoid being overwhelmed?
The Altimeter GPS app uses the integrated barometer of your iPhone (available from iPhone 6S or higher). It shows useful indications such as atmospheric pressure and weather forecast based on the barometer.
The data displayed are the result of the sensors in the mobile device, ie the GPS and the barometer. If the latter is not available in the terminal, the data will be less accurate as the app will be based on data from local weather stations, if available.