NOAA ENC

NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

US4AK7IE - ALASKA


INDEX:
NOTE A
AUTHORITIES
AIDS TO NAVIGATION
WARNING - PRUDENT MARINER
POLLUTION REPORTS
SUPPLEMENTAL INFORMATION
CAUTION - MARINERS
CAUTION - DEPTHS
RACON
CAUTION  USE OF RADIO SIGNALS (LIMITATIONS)
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 (From surveys of 1952-53) and topography by the National Ocean Service, Coast Survey, with additional data from the State of Alaska, the Geological Survey, and U.S. Coast Guard.


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 - 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.


RACON
Radar Transponder Beacons or RACONS are activated by radars operating on the X-Band frequencies 9300 to 9450 MHz and when activated will emit an international morse code character which will be visible on the radar screen that activated the RACON. The effective range of the RACONS will be from 11 to 27 nautical miles. The RACONS will be maintained seasonally from 1 July to 15 September.


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.


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.


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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