Posts: 304
Location: Lino Lakes, MN | Disclamer --- the uncorrected postion on a gps reciever in your phone, in your boat or even a $30,000 survey grade reciever is still no better than 300 feet--- however many times -most of the time it is WAY better than that.
Do not navagate by GPS in the dark--- Know where you are at all times. Boats run aground every year because someone is following a plotted trail-----
I surveyed in the field for several years and our corrected accuracys were incredible but there were times durring each and every day that the accuracy was poor.
the GPS uses the constalation of moving satelites in different orbits coming into and out of the field that the gps reciever uses. Trying to over simplify things IF all the satelites are in one direction or low on the horizon you will have poor accuracy. If the satelites were evenly spaced all around you you would generally have very good accuracy. Your reciever probably is a 12 channel reciever meaning that it will track 12 satelites at a time. If half of those are in poor position they will affect your accuracy.
Sorry if this is a poor example- How old is your H2O? it may be an eight channel reciever-
Be safe
Steve |
