NOAA ENCŪ

NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

US5WA13M - LAKE WASHINGTON SHIP CANAL AND LAKE WASHINGTON


INDEX:

NOTE A
CAUTION - USE OF RADIO SIGNALS (LIMITATIONS)
LAKE WASHINGTON SHIP CANAL - SPEED LIMITS
LAKE WASHINGTON SHIP CANAL - BRIDGE SIGNALS
POLLUTION REPORTS
AIDS TO NAVIGATION
CAUTION - SUBMARINE PIPELINES AND CABLES
CAUTION - TEMPORARY CHANGES
CAUTION - DREDGED AREAS
CAUTION - SMALL CRAFT
CAUTION - WARNINGS CONCERNING LARGE VESSELS
CAUTION - FIXED AND FLOATING OBSTRUCTIONS
SUPPLEMENTAL INFORMATION
NOAA WEATHER RADIO BROADCASTS
MARINE WEATHER FORECASTS
BROADCASTS OF MARINE WEATHER FORECASTS AND WARNINGS BY MARINE RADIOTELEPHONE STATIONS
COLREGS, 80.1395
LOCK SIGNAL
RADAR REFLECTORS
WARNING - PRUDENT MARINER
NOTE D
AUTHORITIES
WATER LEVELS, CURRENTS, AND TIDES
ADDITIONAL INFORMATION
REGULATED NAVIGATION AREA
ADMINISTRATION AREA
USACE HYDROGRAPHIC SURVEYS
COMMENTS REQUESTED


NOTES:

NOTE A
Navigation regulations are published in Chapter 2, U.S. Coast Pilot 10. 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, 13th Coast Guard District in Seattle, Washington or at the Office of the District Engineer, Corps of Engineers in Seattle, Washington.
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.


LAKE WASHINGTON SHIP CANAL - SPEED LIMITS
Speed limit is 7 knots from Hiram M. Chittenden Locks to Webster Point Light (Lake Washington), except in Lake Union test area marked by four buoys.


LAKE WASHINGTON SHIP CANAL - BRIDGE SIGNALS
The signal to open bridges is one prolonged blast followed by one short blast of whistle or horn for all bridges across the Lake Washington Ship Canal. Five short blasts of whistle or horn from any bridge indicates the draw is not ready to be opened immediately.


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).


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


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.


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


CAUTION - DREDGED AREAS
Improved channels are subject to shoaling, particularly at the edges.


CAUTION - SMALL CRAFT
Small craft should stay clear of large commercial and government vessels even if small craft have the right-of-way. All craft should avoid areas where the skin divers flag, a red square with a diagonal white stripe, is displayed.


CAUTION - WARNINGS CONCERNING LARGE VESSELS
The "Rules of the Road" state that recreational boats shall not impede the passage of a vessel that can navigate only within a narrow channel or fairway. Large vessels may appear to move slowly due to their large size but actually transit at speeds in excess of 12 knots, requiring a great distance in which to maneuver or stop. A large vessel's superstructure may block the wind with the result that sailboats and sailboards may unexpectedly find themselves unable to maneuver. Bow and stern waves can be hazardous to small vessels. Large vessels may not be able to see small craft close to their bows.


CAUTION - FIXED AND FLOATING OBSTRUCTIONS
Fixed and floating obstructions, some submerged, may exist along shore of Lake Washington. Mariners are advised to proceed with caution.


SUPPLEMENTAL INFORMATION
Consult U.S. Coast Pilot 10 for important supplemental information.


NOAA WEATHER RADIO BROADCASTS
CITY			STATION		FREQ. (MHz)	BROADCAST TIMES
Seattle, Wash.		KHB-60		162.550		24 hours daily
Olympia, Wash.		WXM-62		162.475		24 hours daily


MARINE WEATHER FORECASTS
NATIONAL WEATHER SERVICE 	TELEPHONE NUMBER	OFFICE HOURS
Seattle, WA			(206) 526-6087		8am to 3pm M-F*

*Recorded forecasts only at other times.


BROADCASTS OF MARINE WEATHER FORECASTS AND WARNINGS BY MARINE RADIOTELEPHONE STATIONS
CITY		STATION		FREQ.		BROADCAST TIMES - PST	SPECIAL WARNING
Seattle, Wash.	NMW-43		157.1 MHz	9:30 AM			*On receipt

* Preceded by announcement on 2182 kHz and 156.8 MHz Distress calls for small craft are made on 2182 kHz or channel 16 (156.80 MHz) VHF.


COLREGS, 80.1395
International Regulations for Preventing Collisions at Sea, 1972. The entire area of this chart falls seaward of the COLREGS Demarcation Line.


LOCK SIGNAL
The signal to open locks is two long blasts followed by three short blasts of whistle or horn for vessels with tows, and two long blasts followed by two short blasts for all other vessels.
Bridge and navigation regulations, including special regulations for transit over the Salt Water Barrier in the Hiram Chittenden Locks, are published in U.S. Coast  Pilot 10. Copies of the regulation may be obtained at the office of the District Engineer, Corps of Engineers, in Seattle. Refer to Section number 207.750 for navigation regulations and section number 117.795 for bridge regulations.


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.


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.


NOTE D
The U.S. Coast Guard operates a mandatory Vessel Traffic Services (VTS) system in the Puget Sound area. Vessel operating procedures and designated radiotelephone frequencies are published in 33 CFR 161, the U.S. Coast Pilot, and/or the VTS User's Manual. The entire area of the chart falls within the Vessel Traffic Services (VTS) system.


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


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.


REGULATED NAVIGATION AREA
A Regulated Navigation Area has been established by the U.S. Coast Guard. Please see Chapter 2, U.S. Coast Pilot 10 or 33 CFR 165.1301 and 33 CFR 165.1303.


ADMINISTRATION AREA
The entire extent of this ENC cell falls within the limits of an Administration Area. This area covers land, internal waters, and territorial sea. The territorial sea is a maritime zone which the United States exercises sovereignty extending to the airspace as well as to its bed and subsoil. For more information, please refer to the Coast Pilot.


USACE HYDROGRAPHIC SURVEYS
USACE conducts hydrographic surveys to monitor navigation conditions. These surveys are not intended to detect underwater features. Uncharted features hazardous to surface navigation are not expected but may exist in federal channels.


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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