Try to integrate more map sources. Check out further lists of possible sources: - https://sites.google.com/site/nauticalfree - http://opencpn.org/ocpn/chart_sources - http://ec2-54-235-76-27.compute-1.amazonaws.com/ienc/web/main/ienc_009.cfm - http://scsenc.eahc.asia/main.php - http://www.antarescharts.co.uk/ - https://www.openseachart.org/doku.php/rnc
