NOAA ENCŪ

NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

US5MI62M - SAINT MARYS RIVER, MUNUSCONG LAKE TO SAULT STE MARIE

INDEX:
AUTHORITIES
NOTE A
CAUTION - TEMPORARY CHANGES
CAUTION - LOW WATER DATUM
CAUTION - DREDGED AREAS
CAUTION - SUBMARINE PIEPLINES AND CABLES
CAUTION - LIMITATIONS
WARNING - PRUDENT MARINER
NOAA WEATHER RADIO BROADCASTS
POLLUTION REPORTS
SUPPLEMENTAL INFORMATION
VESSEL TRAFFIC SERVICES 
AIDS TO NAVIGATION
RADAR REFLECTORS
BRIDGE AND OVERHEAD CABLE CLEARANCES
TIDAL INFORMATION
ADDITIONAL INFORMATION


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


NOTE A
Navigation regulations are published in Chapter 2, U.S. 
Coast Pilot 6. Additions or revisions to Chapter 2 are pub-
lished in the Notice to Mariners. Information concerning 
the regulations may be obtained at the Office of the Com-
mander, 9th Coast Guard District in Cleveland, Ohio or at 
the office of the District Engineer, Corps of Engineers in 
Detroit, Michigan. 
Refer to charted regulation section numbers.


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 endan-
gered by ice, certain aids to navigation are 
replaced by other types or removed. For details 
see U.S. Coast Guard Light List. 


CAUTION - LOW WATER DATUM
Due to periodic high water conditions in the Great Lakes, some 
features charted as visible at Low Water Datum may be submerged, 
particularly in the near shore areas. Mariners should proceed with 
caution.


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


CAUTION - SUBMARINE PIEPLINES AND CABLES
Additional uncharted submarine pipelines and 
submarine cables may exist within the area of 
this chart. Not all submarine pipelines and sub-
marine 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 - 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.


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.


NOAA WEATHER RADIO BROADCASTS
The NOAA Weather Radio stations 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.

Sault Ste. Marie, MI  KIG-74  162.550 MHz (Chan, WX-1)
 

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 6 for important 
supplemental information.


VESSEL TRAFFIC SERVICES 
The U.S. Coast Guard operates a mandatory Vessel Traffic 
Services (VTS) system in the St. Mary's River. 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.


AIDS TO NAVIGATION
Consult U.S. Coast Guard Light List for supplemental inform-
ation concerning aids to navigation. See Canadian List of Lights, Buoys, and Fog
Signals for information not included in the U.S. Coast Guard Light List.


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.


BRIDGE AND OVERHEAD CABLE CLEARANCES
When the water surface is above
Low Water Datum, bridge and overhead clearances are reduced correspondingly.
for clearances see U.S. Coast Pilot 6.


TIDAL INFORMATION 
For tidal information see the NOS Tide Table publication or go to http://co-ops.nos.noaa.gov.


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


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