Open Maps Sea. Offline-Charts - maps ready for download. Google has many special features to help you find exactly what youre looking for.
This charts are usable offline with several ship-plotters and Navigation-equipement on board. OpenAerialMap creates a place for mappers to store and share their work with the rest of the community. However outdoor devices were designed to be used in a car or on a boat as well.
To check these hold the right-bumper on a controller to bring up a radial menu and use the right stick to select a map or hold E on a PC and use the mouse to make a selection.
Open Nautical Charts offers free seacharts for everybody. However outdoor devices were designed to be used in a car or on a boat as well. The basemap is rendered with Mapnik using the OpenStreetMap-data. All sea maps either traditional Bluechart G2 or G2 Vision work without TYPE files as these do not display particularly detailed or multi-coloured images on shore.