The Garmin Striker series is not compatible with charts/bluechart, it is only a pure fishing sonar.
• Bright, sunlight-readable 5” fishfinder with built-in GPS, ice fishing transducer and support for ClearVü scanning sonar
• Includes high wide Garmin CHIRP ice fishing transducer for crisp, clear fish arches and excellent target separation
• Built-in Garmin Quickdraw Contours mapping software lets you create and store maps with 1’ contours for up to 2 million acres
• Built in flasher lets you see your jig or weighted bait and the depth of fish as they swim into the sonar beam
• Portable carrying case holds unit, cables and battery for a successful day on the ice