They wouldn't have had to depend on the stars for navigation. If the sky were cloudy, they wouldn't have been able to use a sextant. GPS and accurate maps would help them avoid obstacles.
Yes, they are. If they were not, your GPS would have at most an accuracy of 50 ft.
While GPS is helpful it is not the most important invention of all time. Some would say computers are the most important invention of all time. However what powers both of these things? Electricity seems to be the most important invention of all time.
The Iranian (Persian) Calendar, is the most accurate and one of the oldest (as far back as 2000 BC Zoroastrianism) calendars.
Because of changes over time the most accurate weather forecasts are short term
Most GPS units are accurate to within a few metres ( 10-20 ).
It depends on the accuracy of your GPS. An accurate GPS can give you the exact coordinates of your location in the world. For the most part, the higher the cost of a GPS, the more accurate it is.
The Garmin Forerunner 405 GPS are an accurate brand of GPS and a good watch.
The GPS is incredibly accurate. The GPS uses Google Maps and MapQuest. If you are concerned about the GPS, download the Google Maps app to get turn by turn directions.
The military has gps technology accurate to approximately 1 millimeter. conventional gps units (like the one in your car) are accurate to about 15 feet.
Yes, very accurate.
Most GPS devices are accurate to within 10-15 feet (3-15 meters) of a target and will be this accurate about 95% of the time. This can change depending on whether the GPS has a clear view of the sky and is able to triangulate properly between satellites.
Car GPS systems are highly accurate providing there is no road construction or detours since you last updated/Synced the device to the servers. Most GPS have automatic updating or even streaming updating which makes arriving at the wrong destination unlikely.
GPS on phones are very accurate. They work just as good as a regular car GPS because they both work off of a satelite that feeds them information.
I would not recommend buying a Polar GPS watch as an alternative to your typical GPS systems. While the Polar GPS is accurate for runners it is not accurate enough for a vehicle.
GPS technology has progressed a lot in the last few years. You can rely on your GPS to provide your vehicle's accurate location, including your latitude/longitude coordinates.
It depends where and how often the device downloads the GPS information. Streets and roads are always changing, so the GPS device must download updates to be accurate.