NOAA ENCŪ NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION US4MI1PE - SAINT MARYS RIVER INDEX: NOTE A AUTHORITIES AIDS TO NAVIGATION CAUTION - TEMPORARY CHANGES CAUTION - LOW WATER DATUM CAUTION - SUBMARINE PIPELINES AND CABLES WARNING - PRUDENT MARINER SUPPLEMENTAL INFORMATION VESSEL TRAFFIC SERVICES AREA NOAA WEATHER RADIO BROADCASTS POLLUTION REPORTS CAUTION - DREDGED AREAS CAUTION - USACE HYDROGRAPHIC SURVEYS SAILING COURSES CAUTION - USE OF RADIO SIGNALS (LIMITATIONS) RADAR REFLECTORS BRIDGE AND OVERHEAD CABLE CLEARANCES WATER LEVELS, CURRENTS, AND TIDES COMMENTS REQUESTED PLANE OF REFERENCE OF THIS CHART ADDITIONAL INFORMATION COPYRIGHT NOTES: NOTE A Navigation regulations are published in Chapter 2, U.S. Coast Pilot 6. 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, 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. 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. AIDS TO NAVIGATION Consult U.S. Coast Guard Light List for supplemental information 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. 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. 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 - 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. 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 6 for details. SUPPLEMENTAL INFORMATION Consult U.S. Coast Pilot 6 for important supplemental information. VESSEL TRAFFIC SERVICES AREA 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. Mariners should consult these sources for applicable rules and reporting requirements. Although mandatory VTS participation is limited to the navigable waters of the United States, certain vessels are encouraged or may be required, as a condition of port entry, to report beyond this area to facilitate traffic management within the VTS area. 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. Sault Ste Marie, MI KIG-74 162.550 MHz Newberry, MI WNG-576 162.450 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). CAUTION - DREDGED AREAS Improved channels are subject to shoaling, particularly at the edges. CAUTION - 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. SAILING COURSES Sailing courses are recommended by the Lake Carriers Association and the Chamber of Marine Commerce as voluntary guidance for course to steer with navigation safety and Collision Regulations always taking priority. 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. 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. 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. 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/. PLANE OF REFERENCE OF THIS CHART Plane of reference of this chart (Low Water Datum). Depths above the locks are referred to the sloping surface of the river when Lake Superior is at elevation 183.2 meters/601.1 feet and the gage above the locks reads 183.1 meters/600.6 feet. Depths below the locks are referred to the sloping surface of the river when the gage below the locks reads 176.3 meters/ 578.4 feet and Lake Huron is at elevation 176.0 meters/577.5 feet. Referred to mean water level at Rimouski, Quebec, International Great Lakes Datum (1985). ADDITIONAL INFORMATION Additional information can be obtained at www.nauticalcharts.noaa.gov/. COPYRIGHT No copyright is claimed by the United States Government under Title 17 U.S.C. However, other nations may claim intellectual property rights on the compilation of data depicting the foreign waters shown on this chart. END OF FILE