NOAA ENCŪ

NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

US4AK3DM - GLACIER BAY
 

INDEX:

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


NOTES:

NOTE A
Navigation regulations are published in Chapter 2, U.S. Coast Pilot 8. Additions or revisions to Chapter 2 are published in the Notices 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 8 for important supplemental information.


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


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


NOAA WEATHER RADIO BROADCASTS
The NOAA Weather Radio stations listed below provide 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.

Althorp Peak, AK		KZZ-86		162.425 MHz
Mt. Robert Barron, AK		KZZ-87		162.450 MHz
Haines, AK			WXM-97		162.400 MHz


CAUTION - GLACIERS AND ICEBERGS
Tidewater glaciers should not be approached closer than 0.5 miles / 0.8 kilometers. Large icefalls create waters dangerous to boats, particularly when near shore or close to bergs. Great pieces of submerged ice attached to the glacier may shoot to the surface hundreds of yards / meters from the face. Shoaling may also exist in these areas due to high rates of sediment deposition. Icebergs should be given a wide berth; approximately 5/6 of the berg is under water and a submerged shelf may be protruding. Icebergs continually melt, sometimes turning over suddenly without warning.


CAUTION - GLACIAL INLETS
Mariners use caution when navigating near the heads of glacial inlets. Heads of glacial inlets are highly changeable.


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 - 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.


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


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


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/.


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.


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.


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.


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