Experience unparalleled coverage and brilliant detail on the water. LakeV? g3 Ultra inland water maps provide exceptional coverage, clarity and detail with integrated Garmin and Navionics data, Auto Guidance technology1 and high-resolution relief shading. Now with superior coverage, extended high-resolution relief shading combines color and shadows to easily find fish-holding structure, artificial reefs, underwater shelves and more. The sonar imagery feature reveals bottom hardness clearly and in vivid color, highlighting both subtle and dramatic transition areas on 115 U.S. lakes.