The electronic compass and the barometrical altimeter are designed for outdoor usage. 15 seconds after a warm start, meaning there are valid coordinates of the satellites available, or approx.
Water resistant up to approx.
Where no movement is not possible, a compass is needed. Even though a GPS provides accurate elevation information, the value slightly varies continoulsy. A barometrical altimeter is therefore more accurate, especially when summarizing elevation changes. Time To First Fix, time until the first information about the current position is acquired. Here we provide additional documentation and software updates related to the eTrex Summit.