Humminbird Helix 12 SI GPS

Features built-in CHIRP sonar to provide enhanced target separation, lower noise, and higher-resolution images. Display Size: 12.1” diagonal. Operating Frequency: Side Imaging, 455 kHz, 800 kHz; DualBeam PLUS, 200 kHz and 83 kHz. Depth Capability: Side Imaging, 150’; DualBeam PLUS, 1,500’. Standard Sonar Coverage: 20°, 60°, (2) 86° (180° Total Coverage), and (2) 55° (130° Total Coverage) @ -10 dB. Waypoints: 2,500. Routes: 47. Tracks/Points: 50/20,000. Power Requirement: 10 to 20V DC. The innovative Helix uses high-frequency beams to vividly reveal structure, cover, and contour changes below the water’s surface. DualBeam PLUS technology utilizes both a narrow beam and a wide beam to provide outstanding detail and a wide coverage area. Side Imaging offers a 180-degree, side-to-side view using an ultra-thin beam that scans areas up to 240 feet on the left and right for a total coverage area of 480 feet! Down Imaging captures a fish-eye’s view of surroundings below your boat. In addition to a GPS receiver with Tracking and Chartplotting, each Helix also features built-in ContourXD base map cartography that covers 3,000 U.S. lakes with depth contours and many other locations without contours. Other features include a backlit color LED display, 16:9 widescreen format that allows you to view cartography and sonar imagery side-by-side, and dual SD card slots.