C-Map Max Chart NA-M939: Passamaquoddy Bay To Block Island (Update) I - Bay of Bengal If these requirements are not

If these requirements are not met

when used alongside official navigational charts

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C-Map Max Chart NA-M939: Passamaquoddy Bay To Block Island (Update) I - Bay of Bengal If these requirements are notWhy 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