Solid Signal > Marine Equipment > Marine Navigation Accessories > Humminbird 409900-1
Switchfire: SwitchFire Sonar -- Take command of how your sonar returns appear with our Clear and Max Modes
Dualbeam Plus Sonar: Two beams combine for great detail and a wide coverage area. Use the narrow beam for high-accuracy returns and bottom. Use the wide beam when you want a larger search area.
Internal GPS: GPS antenna built into the head unit
Unimap Cartography: The Humminbird UniMap is a built-in map covering the contiguous US coastline, inland lakes and rivers at 30 meters per pixel resolution.
Micro SD Card Reader: Use for advanced cartography or to save screenshots, sonar recordings and waypoints or to update your units software.
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