This maps rich layers of blues display Casco Bay's bathymetry in clear and accurate detail. Underwater structures, from the very large West Cod Bank to Witch Rock, are rendered in detail and are easy to visualize. Four additional maps diagram significant historical events that have shaped Casco Bay0s geography and give many place names historical context. Shipwreck positions, lighthouse locations, and Casco Bay's climate are also identified. This large map is at a scale of 1:75,000, is 26"x34", and is suitable for framing.