If you have a GPS on your boat, car, phone, or amongst your tramping gear you will probably have wondered how accurate it really is. Your standard GPS is good for around +/-50m (no matter what the salesperson told you) it will often perform better than this (say +/-10m to +/-20m) but will tend to wander off during the day. The other aspect is the accuracy of the maps used and it is common that errors of 200m or more are found in GPS maps, this is a particular problem with nautical charts (never navigate using just GPS). 

Our survey grade systems are good for around +/-20mm so around 250 times more accurate than domestic systems, however they are around 400 times more expensive!!

If you have a GPS on your boat, car, phone, or amongst your tramping gear you will probably have wondered how accurate it really is. Your standard GPS is good for around +/-50m (no matter what the salesperson told you) it will often perform better than this (say +/-10m to +/-20m) but will tend to wander off during the day. The other aspect is the accuracy of the maps used and it is common that errors of 200m or more are found in GPS maps, this is a particular problem with nautical charts (never navigate using just GPS).

Our survey grade systems are good for around +/-20mm so around 250 times more accurate than domestic systems, however they are around 400 times more expensive!!