NOAA ENC

NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

US4AK4TM - COCHRANE BAY TO PASSAGE CANAL


INDEX:

NOTE A
SUPPLEMENTAL INFORMATION
AUTHORITIES
RADAR REFLECTORS
CAUTION - TEMPORARY CHANGES
AIDS TO NAVIGATION
CAUTION - CALVING
WARNING - PRUDENT MARINER
CAUTION - USE OF RADIO SIGNALS (LIMITATIONS)
CAUTION - SUBMARINE PIPELINES AND CABLES
NOAA WEATHER RADIO BROADCASTS
POLLUTION REPORTS
COLREGS, 80.1705 (see note A)
CAUTION - QUALITY OF BATHYMETRIC DATA
WATER LEVELS, CURRENTS, AND TIDES
ADDITIONAL INFORMATION
COMMENTS REQUESTED


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.


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


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


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.


CAUTION - TEMPORARY CHANGES
Temporary changes or defects in aids to navigation are not indicated. See Local Notice to Mariners. During some winter months or when endangered by ice, certain aids to navigation are replaced by other types or removed. For details see U.S. Coast Guard Light List.


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


CAUTION - CALVING
During the calving season, Columbia Glacier Deposits ice which may drift into the northern part of Prince William Sound. Mariners are advised to exercise extreme caution and to report all ice sightings to "Valdez Traffic" on Channel 13 (156.65 MHz).


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.


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.


CAUTION - SUBMARINE PIPELINES AND CABLES
Additional uncharted submarine pipelines and submarine cables may exist within the area of this chart. Not all submarine pipelines and submarine cables are required to be buried, and those that were originally buried may have become exposed. Mariners should use extreme caution when operating vessels in depths of water comparable to their draft in areas where pipelines and cables may exist, and when anchoring, dragging, or trawling. Covered wells may be marked by lighted or unlighted buoys.


NOAA WEATHER RADIO BROADCASTS
The National Weather Service station listed below provides continuous weather broadcasts. The reception range is typically 20 to 40 nautical miles from the antenna site, but can be as much as 100 nautical miles for stations at high elevations.

Rugged I, AK		WNG-526		162.425 MHz
Naked I, AK		WNG-530		162.500 MHz
Point Pigot, AK		KZZ-93		162.450 MHz
Cape Hinchinbrook	WNG-532		162.525 MHz
Potato Point, AK	WNG-527		162.425 MHz
Wasilla, AK		KZZ-98		162.400 MHz
Valdez, AK		WXJ-63		162.550 MHz
Cordova, AK		WXJ-79		162.400 MHz
Whittier, AK		KXI-29		162.400 MHz
East Point, AK		WNG-530		162.500 MHz


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).


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.


CAUTION - QUALITY OF BATHYMETRIC DATA
The areas represented by the object M_QUAL (Quality of Data) are approximate due to generalizing for clarity. Caution is advised, particularly for nearshore navigation or voyage planning. M_QUAL represents areas of uniform quality of bathymetric data. The CATZOC (Category of Zone of Confidence in Data) attribute of M_QUAL provides an assessment of the overall zone of confidence.


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.


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


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/ .


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