The Humminbird Helix 7 chirps mega GPS G4 helps you catch fish anywhere and gives you a deeper understanding of what's below the ice. It has highly-detailed fish arches and a clear view of the fish-holding structure and the bottom. The dual spectrum chirp 2d sonar has two ways to search, a wide mode for maximum coverage and a narrow mode for focusing on the slightest detail. Their enhanced base map provides you with a clear view of underwater terrain and surrounding points of interest so you can fish and navigate with total confidence.