Not everything your GPS unit is telling you is correct. You should be aware of your surroundings when you navigate. Fortunately, there's a way for you to improve GPS accuracy. It's through this GlobalSat BT-821 Bluetooth GPS Receiver which connects to your smartphone, tablet, or other portable devices that you use for navigation. This high-performance GPS receiver supports 210 PRN channels, 66 search channels, and 22 simultaneous tracking channels. Equipped with a built-in antenna, GlobalSat ensures excellent signal reception. The battery doesn't disappoint too; it lasts up to 24 hours of continuous use.
Amazon customer reviewers have varied purposes for this receiver. Most say that it has so far been effective for their sailboat and car navigation. It's been quick and accurate, pulling up its rating to 4 out of 5 stars.