**Preview map is LOW RESOLUTION. See gallery below for HD sample images.**
- Description: High definition 3D images of the seafloor.
- Coverage: Gulf of Maine, including Bar Harbor, Casco Bay, Portsmouth, Boston, Cape Cod Bay, Jeffreys Ledge, and more.
- Works on: Lowrance, Simrad, B&G, mobile devices, and computers.
- Notes: Huge hard bottom areas, rocky channels, swells, basins, ledges, and banks. Resolution varies depending on the area.