NOAA ENC

NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

US4AK7KM - ADAK ISLAND TO TANAGA ISLAND


INDEX:

NOTE A
CAUTION - USE OF RADIO SIGNALS (LIMITATIONS)
POLLUTION REPORTS
RADAR REFLECTORS
AIDS TO NAVIGATION
CAUTION - TEMPORARY CHANGES
SUPPLEMENTAL INFORMATION
COLREGS, 80.1705
CAUTION - HEAVY TIDES
CAUTION - UNCHARTED ROCKS
AUTHORITIES
WARNING - PRUDENT MARINER
WATER LEVELS, CURRENTS, AND TIDES
COMMENTS REQUESTED
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.


CAUTION - USE OF RADIO SIGNALS (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.


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.


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


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.


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


CAUTION - HEAVY TIDES
Extremely heavy tide rips and strong currents, which at times make control of vessel difficult, may be encountered in the passages between the North Pacific Ocean and the Bering Sea. See Tidal Current Tables for supplemental information.


CAUTION - UNCHARTED ROCKS
Numerous uncharted rocks may exist shoreward of the 10 meter curve.


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


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.


WATER LEVELS, CURRENTS, AND TIDES
Real-time water levels, tide predictions, and tidal current predictions are available on the internet from NOAA's Center for Operational Oceanographic Products and Services (CO-OPS) at https://tidesandcurrents.noaa.gov/water_level_info.html and https://tidesandcurrents.noaa.gov/currents_info.html.


COMMENTS REQUESTED
NOAA encourages users to submit inquiries, discrepancies, or comments about this chart via NOAA's ASSIST tool at https://www.nauticalcharts.noaa.gov/customer-service/assist/.


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


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