C-Map 4D Chart NA-D061: Great Lakes & St. Lawrence Seaway (Update) South Europe Flags and stairway identification or decorative

and stairway identification or decorative purposes

insurance and bunkering

a direction arrow and the word 'Exit'

Whether you are a professional mariner or a recreational boater

- Step-by-step instructions for all knots

C-Map 4D Chart NA-D061: Great Lakes & St. Lawrence Seaway (Update) South Europe Flags and stairway identification or decorativeWhy Update Your C Map Chart? Why Update Your C Map Chart? It is very important that the latest C Map charts are used when sailing out in the open water for safe navigation purposes. The C Map electronic chart libraries get updated twice a year to coincide with popular boating sessions. Included in the library updates are the latest notice to mariner updates from government hydrographic offices, updates to marina facilities, port services, photos and