'The Edge 305 has a high-sensitivity SiRFstarIII receiver that is designed to work even through dense foliage or when in deep canyons (natural or man-made).'
'Other than that, it still uses a quad-helix high-sensitivity antenna, supports wireless sharing with other compatible Garmin units, and locks onto satellite paths to avoid dropping reception even in heavy cover.'
'Hikers and campers will be able to find trails and clearings for campsites, geocachers can glean information about terrain in their target areas, and hunters can scout places for standards.'