NOAA ENCŪ

NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

US5MD1AM - CHESAPEAKE BAY - CHOPTANK RIVER; CAMBRIDGE


INDEX:

NOTE A
SUPPLEMENTAL INFORMATION
AIDS TO NAVIGATION
AUTHORITIES
POLLUTION REPORTS
CAUTION - TEMPORARY CHANGES
WARNING - PRUDENT MARINER
CAUTION - QUALITY OF BATHYMETRIC DATA
CAUTION - USACE HYDROGRAPHIC SURVEYS
CAUTION - USE OF RADIO SIGNALS (LIMITATIONS)
CAUTION - SUBMARINE PIPELINES AND CABLES
RACING BUOYS
NOAA WEATHER RADIO BROADCASTS
SMALL CRAFT WARNINGS
RADAR REFLECTORS
ADMINISTRATION AREA
WATER LEVELS, CURRENTS, AND TIDES
COMMENTS REQUESTED
OYSTER AQUACULTURE
ADDITIONAL INFORMATION


NOTES:

NOTE A
Navigation regulations are published in Chapter 2, U.S. Coast Pilot 3. 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, 5th Coast Guard District in Portsmouth, Virginia or at the Office of the District Engineer, Corps of Engineers in Baltimore, Maryland.  Refer to charted regulation section numbers.


SUPPLEMENTAL INFORMATION
Consult U.S. Coast Pilot 3 for important supplemental information.


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


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.


POLLUTION REPORTS
Report all spills of oil and hazardous sub-
stances 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 - 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.


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.


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.


CAUTION - USACE HYDROGRAPHIC SURVEYS
USACE conducts hydrographic surveys to monitor navigation conditions. These surveys are not intended to detect underwater features. Undetected features hazardous to surface navigation may exist in federal channels, as might shoaling, particularly along the edges of channels. For more information visit https://navigation.usace.army.mil/Survey/Hydro/ .


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.


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 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. 


RACING BUOYS
Racing buoys within the limits of this chart
are not shown hereon. Information may be
obtained from the U.S. Coast Guard District
Offices as racing and other private buoys are
not all listed in the U.S. Coast Guard Light List.


NOAA WEATHER RADIO BROADCASTS
The NOAA Weather Radio stations listed
below provide continuous weather broadcasts.
The reception range is typically 37 to 74 kilometers /
20 to 40 nautical miles from the antenna site, but can 
be as much as 185 kilometers / 100 nautical miles for 
stations at high elevations.

Baltimore, MD     KEC-83     162.400 MHz
Salisbury, MD     KEC-92     162.475 MHz
Heathsville, VA   WXM-57     162.400 MHz
Sudlersville, MD  WXK-97     162.500 MHz		


SMALL CRAFT WARNINGS
During the boating season small-craft
warnings will be displayed from sunrise to
sunset on Maryland Marine Police Cruisers
while underway in Maryland waters of the
Chesapeake Bay and tributaries.


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.


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 over 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. 


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/ .


OYSTER AQUACULTURE
Oyster bed aquaculture leases may exist within the limits of
this chart. Mariners are cautioned that numerous markers
may exist and watermen may be active in the area. Caution
should be exercised when navigating in or near these areas,
not to anchor or ground, in order to avoid damage to the
beds. Depths may be shallower than the soundings shown.
For more information, contact the local department of natural
resources.


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


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