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Nautical Charting Links
NOAA
Center for Operational Oceanographic Products and Services (CO-OPs)
Tides, water levels, currents, Physical Oceanographic Real Time Systems (PORTS®)

National Geodetic Survey (NGS)
Aerial Photography, shoreline mapping, horizontal and vertical reference systems

National Marine Sanctuaries
Nation's system of marine protected areas

National Geophysical Data Center
Obtain hydrographic and bathymetric data that serve as a basis for nautical charts

NOS Data Explorer
The National Ocean Service (NOS) Data Explorer serves as a portal to obtain NOS spatial data

FEDERAL
USCG Local Notice to Mariners, Light Lists and more
USCG Navigation Center: Local Notice to Mariners, DGPS, LORAN C, Electronic Navigation, Navigation Rules

U.S. Notice to Mariners (NGA)
The U.S. Notice to Mariners corrects National Geospatial-Intelligence Agency Charts and NOAA charts using information collected from many sources. From all sources the US Notice to Mariners will contain only those chart corrections of interest to ocean going vessels.

NGA Digital Nautical Charts (DNC®)
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.

U.S. Navy Oceanographic Office (NAVOCEANO)
NAVOCEANO acquires and analyzes global ocean and littoral data to provide specialized, operationally significant products and services. Some hydrographic surveys conducted by NAVOCEAO may appear on NOAA charts

U.S. Army Corps of Engineers(USACE)
Visit local districts and find information about hydrographic surveys and dredging conducted in federal channels

Canadian Coast Guard Notice to Mariners
Canadian Coast Guard Notices affect selected NOAA charts

USACE Navigation Information Connection
Navigation charts, aerial photos, vessel information on Mississippi River

USACE Electronic Charting Home Page
Information concerning USACE Electronic Chart Program, Inland Electronic Navigational Charts (IENC)

USACE Ocean Disposal Database
Find out information about offshore disposal sites that appear on NOAA charts

USGS Geographic Names Information System
U.S. Geological Survey website that provides information on official geographic names that appear on NOAA charts

USGS Coastal and Marine Geology Program
USGS conducts deepwater bathymetric surveys. Also conducts shoreline surveys. Data may appear on NOAA charts.

EPA Ocean Regulatory Programs
EPA Ocean Dumping and Dredged Material Management website. Dump sites and disposal areas appear on charts.

Marine Boundary Working Group
Multi-agency working group that provides information about marine boundaries that appear on nautical charts

Bureau of Ocean Energy Management
Works with NOAA on marine boundary issues. Provides information on offshore oil rigs.

Recreational Boating Organizations
United States Power Squadrons
60,000 member recreational boating organization who report chart discrepancies through Cooperative Charting Program

United States Coast Guard Auxiliary
30,000 member recreational boating organization that report chart discrepancies through Chart Update program

Boat U.S.
Largest boating organization in U.S.

Hydrographic Organizations
IHO S-57 Standard
IHO TRANSFER STANDARD FOR DIGITAL HYDROGRAPHIC DATA S-57 Edition 3.1 November 2000

IHO Publications Download
Download S-44, S-47, S-51, S-52, S-57, S-58, S-62, S-63 for free Others at cost.

International Hydrographic Organization
Home Page

International Federation of Hydrographic Societies
International Federation of Hydrographic Societies (formerly "The Hydrographic Society")

The Hydrographic Society of America
The mission of THSoA is to promote education in hydrography. Links to numerous reference materials 
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