GLONASS is Russia’s version of GPS. It tells electronic devices where you are.
It is increasingly used in high-end SMART devices, including the new Garmin 920XT.
GLONASS is neither particularly better nor worse than GPS.
HOWEVER, when they are used TOGETHER the likelihood of accuracy *IS* increased.
It is said that using GPS+GLONASS can give accuracy down to 4.5/5m and can also improve accuracy in built-up areas; especially in the Northern Hemishpere (that’s where Russia is, right?).
Downsides: None really. Might use a tad more battery power though.
Do I really need it? It will help with tree cover and nearby tall building. It shouldn’t hurt.
Future: Europe’s Galileo system will come into action around 2020. Many chips currently enabled with GPS and GLONASS also support BDS. Increased accuracy is hopefully going to happen then.
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