NOAA ENC

NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

US4AK7IX - ALASKA 


INDEX:
NOTE A
AUTHORITIES
AIDS TO NAVIGATION
WARNING - PRUDENT MARINER
POLLUTION REPORTS
SUPPLEMENTAL INFORMATION
CAUTION - TEMPORARY CHANGES
CAUTION - MARINERS
CAUTION - DEPTHS
CAUTION - LIMITATIONS
SUBSISTENCE WHALING IN THE BEAUFORT SEA
COLREGS, 80.1705 (see note A)
TIDAL INFORMATION
ADDITIONAL INFORMATION


NOTES:
NOTE A: 
Navigation regulations are published in Chapter 2, U.S. Coast Pilot 9.  Additions or revisions to Chapter 2 are published in the Notice to Mariners.  Information concerning the regulations may be obtained at the Office of the Commander, 17th Coast Guard District in Juneau, Alaska, or at the Office of the District Engineer, Corps of Engineers in Anchorage, Alaska. Refer to charted regulation section numbers. 


AUTHORITIES: 
Hydrography and topography by the National Ocean Service, Coast Survey, with additional data from the State of Alaska.


AIDS TO NAVIGATION: 
Consult U.S. Coast Guard Light List for supplemental information concerning aids to navigation.


WARNING - PRUDENT MARINER: 
The prudent mariner will not rely solely on any single aid to navigation, particularly on floating aids. See U.S. Coast Guard Light List and U.S. Coast Pilot for details.


POLLUTION REPORTS: 
Report all spills of oil and hazardous substances to the National Response Center via 1-800-424-8802 (toll free), or to the nearest U.S. Coast Guard facility if telephone communication is impossible (33 CFR 153).


SUPPLEMENTAL INFORMATION: 
Consult U.S. Coast Pilot 9 for important supplemental information.


CAUTION - TEMPORARY CHANGES: 
Temporary changes or defects in aids to navigation are not indicated.  See Local Notice to Mariners.


CAUTION - MARINERS:
Mariners are advised that in the shallow waters of the Beaufort Sea, water levels are strongly influenced by meteorological conditions.  Strong offshore winds can produce water depths up to 0.8 meters (2.6 feet) less than those shown.


CAUTION - DEPTHS:
Depths may vary as much as 1.8 meters (6 feet) due to iceberg groundings.


CAUTION - LIMITATIONS: 
Limitations on the use of radio signals as aids to marine navigation can be found in the U.S. Coast Guard Light Lists and National Geospatial-intelligence Publication 117. Radio direction-finder bearings to commercial broadcasting stations are subject to error and should be used with caution.


SUBSISTENCE WHALING IN THE BEAUFORT SEA: 
Mariners should be aware that Alaskan Natives engage in subsistence whaling in the Beaufort Sea from August 15 to October 31. Vessel operators are requested to contact the Alaska Eskimo Whaling Commission at (907) 852-2392, or aewcdir@barrow.com prior to entering this area for information about the location and avoidance of traditional Native hunting parties.


COLREGS, 80.1705 (see note A): 
International Regulations for Preventing Collisions of Sea, 1972. The entire area of this chart falls seaward of the COLREGS Demarcation Line.


TIDAL INFORMATION
For tidal information see the NOS Tide Table publication or go to https://tidesandcurrents.noaa.gov/.


ADDITIONAL INFORMATION
Additional information can be obtained at www.nauticalcharts.noaa.gov


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