![]() You might also want to get a model that provides expandable memory cards, so you can carry larger maps memory cards containing map sets are available, too. If you plan to use your device for navigation when you’re away from your Mac, being able to download detailed maps is essential. ![]() You can download map data to many GPS units. ![]() If you’ll be using your GPS unit in North America, one that’s compatible with the Wide Area Augmentation System (WAAS) will be slightly more accurate than one that isn’t. If you spend a lot of time navigating around skyscrapers, or in deep canyons or thick forests, you may want to spend the extra money. Pricier GPS units often have stronger receivers, which will perform better when your view of the sky is restricted. You pair a Bluetooth GPS device with your Mac just as you would pair a cell phone or a Bluetooth keyboard. A wireless interface can be especially useful if you plan to use a GPS unit in your car, where you don’t want to hassle with cables.
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