Natical charts

http://dnc.nga.mil/NGAPortal/DNC.portal

The Digital Nautical Chart is produced by the National Geospatial-Intelligence Agency (NGA) and is an unclassified, vector-based digital database containing maritime significant features essential for safe marine navigation. DNCs 018, 026, 027, and 028 are produced in partnership with Canadian Forces Mapping and Charting Establishment Hydrographic Services Office (Esquimalt). Initial data collection of the database is from a portfolio of approximately 5,000 nautical charts that will ultimately provide global marine navigation between 84 North latitude and 81 South latitude and supports a variety of Geographic Information System applications. DNC® Regions (Click on a region for DNC®downloadable files) DNCDX 001,  005,  007,  010,  017,  018,  019  - VDU patches available at NtM 33/12 DNCDX 002,  004,  006,  008,  011,  016,  022,  028  - VDU patches available at NtM 32/12 DNCDX 003,  009,  012,  015,  021,  024,  029  - VDU patches available at NtM 31/12 DNCDX 013,  014,  020,  023,  025,  026,  027  - VDU patches available at NtM 30/12