MapMedia Navionics Wide Vector Chart: WVNNA911MAP - Central America (Update) Navigation Calculators Longkou Gang and Approaches is

Longkou Gang and Approaches is a standard nautical chart

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British Admiralty Nautical Chart  1612: Harbours and Anchorages on the East Coast of England and Scotland is a standard nautical chart

MapMedia Navionics Wide Vector Chart: WVNNA911MAP - Central America (Update) Navigation Calculators Longkou Gang and Approaches isHow MapMedia electronic charts are updated To meet the needs and safety of users, MapMedia updates its vector charts once or twice a year, according to the chart providers' updates, and once a year for raster charts. It is of course, extremely important for boaters to keep their charts up to date, in order to ensure the safety of all passengers onboard. Corrections, improvements and changes are made on a daily basis by the Hydrographic Services and by