eTrex Summit HC has a built-in electronic compass that provides bearing information even while you're standing still, and its barometric altimeter tracks changes in pressure to pinpoint your precise altitude. You can even use the altimeter to plot barometric pressure over time, which can help you keep an eye on changing weather conditions.
eTrex Summit HC's basemap contains lakes, rivers, cities, interstates, national and state highways, railroads and coastlines. Summit HC also includes 24 MB of internal memory, so you can load waypoints and routes from the included MapSource Trip & Waypoint Manager software and add map detail from Garmin's entire line of optional MapSource mapping products. Its 256-color, sunlight-readable display makes it easy to distinguish map details - even in bright sunlight.