NOAA ENC

NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

US4AK3TD - ALASKA

INDEX:
NOTE A
CAUTION - LIMITATIONS
CAUTION - TEMPORARY CHANGES
SUPPLEMENTAL INFORMATION
AIDS TO NAVIGATION
POLLUTION REPORTS
RADAR REFLECTORS
COLREGS, 80.1705 (see note A)
WARNING - PRUDENT MARINER
AUTHORITIES
TIDAL INFORMATION
ADDITIONAL INFORMATION
WARNING - BATHYMETRY FROM SMALLER SCALES


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.


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 Agency Publication 117.  Radio direction-finder bearings to commercial broadcasting stations are subject to error and should be used with caution.


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


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


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


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).


RADAR REFLECTORS
Radar reflectors have been placed on many floating aids to navigation. Individual radar reflector identification on these aids has been omitted from this chart.


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


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.


AUTHORITIES
Hydrography and topography by the National Ocean Service, Coast Survey, with additional data from the U.S. Coast Guard.


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.


WARNING - BATHYMETRY FROM SMALLER SCALES
Hydrography is from smaller scale sources. Positions of all depths are approximate. Depths between soundings can only be inferred. Uncharted shoals, features, and large depth anomalies may exist in these areas, especially in areas of irregular relief.


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