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Símbología de Cartas Maritimas
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Symbology for displaying Electronic Navigational Charts (ENCs) on Electronic Chart Display and Information Systems (ECDIS) has been added to U.S. Chart No. 1.In addition to the ECDIS symbols shown in the traditional lettered sections of U.S. Chart No. 1, there are now several special pages devoted exclusively to providingimportant details about ECDIS. These pages are distinguished by the ECDIS icon, as shown in the top left corner of this page. The ECDIS pages are also listed in the tableof contents in italic type.
One major difference in the use of paper charts and ENCs is the ability of ECDIS to display the same feature differently depending on user settings and otherconditions, such as a ship’s draft. An important example is that ECDIS displays wrecks, rocks and other obstructions with their traditional “paper chart” symbols ifthey are at or deeper than the depth of the safety contour set for the ship. Dangers that are shoaler are portrayed with the unique ECDIS “isolated danger” symbolshown at left. (See the ECDIS Portrayal of Depths page for more information about the ECDIS safety contour.)^ Another advantage that ECDIS provides over paper charts is enabling users to obtain more information about a feature through a “cursor pick.” Some feature attribute values that can be obtained by cursor pick are noted throughout U.S. Chart No. 1. This is especially true if a particular value, such as height, vertical clearance or the like is included in the INT symbol description. The cursor pick icon, shown at left, is used to indicate when a reference to a cursor pick is made. 7KHUHDUHPDQ\RWKHUDWWULEXWHYDOXHVWKDWXVHUVPD\REWDLQWKURXJKDFXUVRUSLFNWKDWDUHQRWVSHFL¿FDOO\QRWHG7KHVHLQFOXGHEXWDUHQRWOLPLWHGWRWKH purpose, seasonality, periodicity, status, color, height, type of structure and the visual or radar conspicuousness of features; shape, color or color pattern of buoys;characteristics of lights; category of obstructions and wrecks; radar wave length, radio frequency, communication channel and call signs; the presence of AIStransmitted signals; information regarding pilotage services and many more. U.S.^
Chart No. 1 is a handy guide for ECDIS users, but it is no substitute for mandated ECDIS training. The ECDIS user and developer communities are invited to help improve the presentation of ECDIS symbology and information in U.S. Chart No. 1. Please le
t^ us know what
additional information you would like to see in the next edition.Corrections, comments, or questions regarding U.S. Chart No. 1 may be submitted through ASSIST, the NOAA Coast Survey stakeholder engagement and feedback websiteat^ www.nauticalcharts.noaa.gov/customerservice/assist
or mailed to:National Ocean Service, NOAA (N/CS2) Attention: U.S. Chart No. 11315 East West HighwaySilver Spring, MD 20912-3282 2
4
INTRODUCTIONTwo Symbology Types Comprising Four Symbology Sets^ U.S.
Chart No. 1 presents two types of symbology used for marine navigation – thesymbols used on paper nautical charts (and their digital raster image equivalents)and the corresponding symbols used to portray Electronic Navigational Chart (ENC)data on Electronic Chart Display and Information Systems (ECDIS). Within these two types, four separate symbology sets are shown. These are describedbelow: Paper Chart Sym
Eols INT —
Regulations
for International
Charts and Chart Speci
¿cations of the I
(International Hydrographic Organization). These symbols are used bymany countries around the world, including the United States. NOAA — Symbols used on charts produced by the National Oceanic and
Atmospheric Administration (NOAA) when an INT symbol is not used.NOAA produces nautical charts for all U.S. waters, including the GreatLakes and U.S. Territories. NGA — Symbols used on charts produced by the National Geospatial-
Intelligence Agency (NGA) when an INT symbol is not used. NGAproduces nautical charts for the U.S. military and for areas outside of U.S.^
waters.
ECDIS Sym
Eols ECDIS — Symbols used to portray ENCs on ECDIS navigation systems. Use
of ECDIS is required for large commercial ships on international YR\DJHV7KHVHV\PEROVDUHVSHFL¿HGLQ
I+2^ Speci
¿cations for Chart
Content and Display Aspects of ECDIS
Other Non-ECDIS Digital Displays May Portray Data Differently 1DYLJDWLRQV\VWHPVFHUWL¿HGWRPHHWWKHH[DFWLQJSHUIRUPDQFHVWDQGDUGVHVWDEOLVKHG by the International Maritime Organization (IMO) are said to be ECDIS “typeapproved.” The symbology used to display ENCs or other non-ENC navigational dataon non-ECDIS systems, such as geographic information systems, recreational GPS DQGRWKHUFKDUWGLVSOD\V\VWHPVFDQGLIIHUVLJQL¿FDQWO\IURPWKHV\PERORJ\VSHFL¿HG for ECDIS type approved systems. U.S. Chart No. 1 only shows the symbology usedon ECDIS.
Chart No. 1 and Typical Chart Layouts A brief description of the columns on each symbol description page is provided here.A detailed schematic layout of U.S. Chart No. 1 is on page 8. Section A, on pages 10and 11 presents schematics showing typical layouts of the major elements of NOAAand NGA charts.^ Col 1 — Symbol number. The number together with the section letter which
DSSHDUVDWWKHWRSRIHDFKSDJHFRQVWLWXWHVDXQLTXHLGHQWL¿HUIRUHDFK symbol, such as C1 for the “Coastline, surveyed” symbol. Col 2 — INT symbol example.Col 3 — Description of the feature or real world phenomenon being portrayed.Col 4 — NOAA symbol example. This column will be blank if NOAA uses the INT
symbol shown in column 2. Col 5 — NGA symbol example. This column will be blank if NGA uses the INT
symbol shown in column 2. If columns 4 and 5 are combined, then NOAA and NGA both use the same symbol,which is different from the INT symbol.^ Col 6 — Other NGA symbol examples. NGA produces facsimiles of some foreign
charts. If the depiction on the chart is different than the INT or NGAsymbols (shown in Cols 2 and 5, respectively) then the additional foreignsymbols are shown here. Col 7 — ECDIS symbol example in the day color palettes.
(See page 9 for a description of ECDIS color palettes.) Col 8 — The ECDIS description usually provides the generic symbol name given
in the
Speci
¿cations for Chart Content and Display Aspects of
ECDIS
, although sometimes other clarifying terms are also provided.
The schematic layout on page 7 shows a typical symbol table page and provides moredetails about the table headers and the types of information presented in each of thecolumns.
5
Colors Color conveys the nature and importance of features found on nautical charts. &KDUWHOHPHQWVVLJQL¿FDQWWRPDULQHQDYLJDWLRQVXFKDVOLJKWVFRPSDVVURVHVDQG regulated areas, are emphasized with magenta. Lateral marks on NOAA charts are VKRZQZLWKDUHGRUJUHHQ¿OO6KDGHVRIEOXHGHSLFWSRWHQWLDOKD]DUGVWRQDYLJDWLRQ typically shallow water and submerged obstructions. Areas of deeper water believedto be clear of obstructions are shown as white. Land, and other features that arealways dry, are depicted with buff on NOAA charts and gray on NGA charts. Foreshoreand other intertidal features are portrayed with a green tint. Other colors may be usedto provide additional information, such as protected areas, which are outlined in blueor green. 7UDI¿F6HSDUDWLRQ6FKHPHV 7UDI¿FVHSDUDWLRQVFKHPHVVKRZUHFRPPHQGHGODQHVWRLQFUHDVHVDIHW\RIQDYLJDWLRQ particularly in areas of high density shipping. These schemes are described in theInternational
Maritime
Organization
publication,
Ships
Routeing.
separation schemes are generally shown on nautical charts at scales of 1:600,000 DQGODUJHU:KHQSRVVLEOHWUDI¿FVHSDUDWLRQVFKHPHVDUHSORWWHGWRVFDOHDQGVKRZQ as depicted in Section M. Conversion Scales Depth conversion scales are provided on all charts to enable the user to work inmeters, fathoms or feet. Correction Date The date of each new chart edition is shown below the lower left border of the chart.The date of the latest NGA issued U.S. Notice to Mariners applied to the chart isshown after the edition date. NOAA charts also show the date of the latest U.S. CoastGuard Local Notice to Mariners applied to the chart.
ADDITIONAL RESOURCES Information on the use of nautical charts, aids to navigation, sounding datumsand the practice of navigation in general is in
^7 he American Practical Navigator
(Bowditch), available through the “Publications” link on the NGA Maritime SafetyInformation portal at
https://msi.nga.mil/NGAPortal/MSI.portal
Tide and current data over U.S. waters is available from the NOAA Center forOperational Oceanographic Products and Services at https://tidesandcurrents.noaa.gov
'HWDLOHGLQIRUPDWLRQDERXWVSHFL¿FOLJKWVEXR\VDQGEHDFRQVDQGJHQHUDO information about the U.S. Aids to Navigation System and the Uniform StateWaterway Marking Systems is in the U.S. Coast Guard
Light List,
at
https//www.navcen.uscg.gov/?pageName=lightLists
Information about aids to navigation in foreign waters is in the NGA
List of Lights,
available through the “Publications” link on the NGA Maritime Safety Informationportal at
https://msi.nga.mil/NGAPortal/MSI.portal
Other important information that cannot be shown conveniently on nautical chartscan be found in the NOAA
U.S. Coast Pilot
®,^ at
https://nauticalcharts.noaa.gov/publications/coast-pilot/index.html and NGA
Sailing Directions,
available through the “Publications” link on the NGA
Maritime Safety Information portal at
https://msi.nga.mil/NGAPortal/MSI.portal
Nautical Chart Catalogs and Indexes NGA catalogs are available through the “Product Catalog” link on the NGA MaritimeSafety Information portal at
https://msi.nga.mil/NGAPortal/MSI.portal
NOAA catalogs are available at the NOAA Chart Locator at www.charts.noaa.gov/InteractiveCatalog/nrnc.shtml
and the NOAA Nautical Chart
Catalog and Chart Viewer at
www.charts.noaa.gov/ChartCatalog/MapSelect.html
A list of the dates of the latest editions of NOAA charts is at https://nauticalcharts.noaa.gov/charts/list-of-latest-editions.html
CORRECTIONS AND COMMENTS Corrections to U.S. Chart No. 1 will appear in the weekly U.S. Notice to Mariners,available through the “Notice to Mariners” link on the NGA Maritime SafetyInformation portal at
https://msi.nga.mil/NGAPortal/MSI.portal
Corrections, comments, or questions regarding U.S. Chart No. 1 may be submittedthrough ASSIST, the NOAA Coast Survey stakeholder engagement and feedbackwebsite at
www.nauticalcharts.noaa.gov/customer-service/assist
or to:National Ocean Service, NOAA (N/CS2)Attention: U.S. Chart No. 11315 East West HighwaySilver Spring, MD 20910-
7
A^ K
B
Rocks
Supplementary national symbol: a
3ODQHRI5HIHUHQFHIRU+HLJKWVĺ+3ODQHRI5HIHUHQFHIRU'HSWKVĺ+ No.^
INT^
'HVFULSWLRQ
NOAA^
NGA^
Other NGA
(&',
11
Rock which covers and uncov-ers, height above chart datum
( )^2
(^4) ( ) 2
(^ )^06 Uncov 1m^ (^ )^06 Uncov 1m
rock which covers anduncovers or is awash atlow water underwater hazard whichcovers and uncovers withdrying height isolated danger of depthless than the safetycontour
C^
'
E
2 1
3
4a^
4b^
5
6
7
Section designationSectionSub-sectionReference to “Supplementary national symbols” at the end of each sectionCross-reference to terms in other sections &ROXPQ 1XPEHULQJV\VWHPIROORZLQJWKH³&KDUW6SHFL¿FDWLRQRIWKH,+2´$OHWWHULQWKLVFROXPQLQGLFDWHVDVXSSOHPHQWDU\QDWLRQDOV\PERORUDEEUHYLDWLRQIRUZKLFKWKHUHLVQRLQWHUQDWLRQDOHTXLYDOHQW &ROXPQ 5HSUHVHQWDWLRQWKDWIROORZVWKH³&KDUW6SHFL¿FDWLRQVRIWKH,+2´ ,17V\PERO Column 3: Description of symbol, term, or abbreviationColumn 4a: Representation used on charts produced by the National Oceanic and Atmospheric Administration (NOAA)Column 4b: Representation used on charts produced by the National Geospatial-Intelligence Agency (NGA)Column 5: Representation of symbols that may appear on NGA reproductions of foreign chartsColumn 6: Representation used to portray ENC data on ECDISColumn 7: Description of ECDIS symbols
A^
Chart Number, Title, Marginal Notes
Schematic Layout of a NOAA Chart (reduced in size)
Note: this is an example only and not to be used for navigation
0DJQHWLF)HDWXUHVĺ% 7LGDO'DWDĺ+^1
Chart number in national chart series 2
Chart number in international (INT) series (if any) 3
Reference ellipsoid of the chart 4
Publication note (imprint) 5
Copyright note 6
Date of current edition 7
Notice to Mariners corrections 8
Dimensions of inner borders 9
Corner coordinates 10
Chart title 11
Explanatory notes on chart construction, etc. To be readbefore using chart. 12
Seal(s) 13 14
Scale of chart. Some charts have scale at a statedlatitude.Linear scale on large scale charts
12
Mercator Projection 6FDOH DW/DW ƍ North American Datum of 1983(World Geodetic System 1984) 13
3
ƍƎN Unimak Pass1:
(^13)
ƍƎW 14
ƍƎ:^ ƍƎ
(^0500)
1.0Yards (^1000 ) Nautical Miles (^0) 0.1^500 1000 1500 500 0
Meters ƍƎ:^ ƍƎ
Published at Washington, D.C. U.S.^ DEPARTMENT OF COMMERCENATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION NATIONAL OCEAN SERVICECOAST SURVEY^4
10
Chart Number, Title, Marginal Notes
A
15
Linear border scale on large scale charts. On smallerscales use latitude borders for sea miles. 16
Cautionary notes (if any). Information on particular fea
tures, to be read before using chart. 17
Source Diagram (if any). Navigators should be cautiouswhere surveys are inadequate. 18
Reference to a larger scale chart 19
Reference to an adjoining chart of similar scale a^
Conversion scales b^
Reference to the units used for depth measurement c^
Compass rose d^
%DUFRGHDQGVWRFNQXPEHU e^
Glossary: Translation of words on chart that are not inEnglish g^
Tidal and Tidal Stream information within the chartcoverage
11
Positions, Distances, Directions, Compass
B
Description
NOAA
NGA^
Other NGA
ECDIS
No.^
INT
Control Points^2021
† (^22) 25.1 25.
Note: ECDIS uses a magenta “km” symbol to represent distance marks. However, the distances shown along waterways on NOAA-produced ENCs are displayed in statute miles. Symbolized Positions (Examples)^30313233
† Units^40
km
m
dm
cm
mm
45
M^
NMi
ft
fm, fms
Triangulation Point Observation spot Fixed point Distance along waterway,no visible marker Distance along waterway withvisible marker Symbols in plan—position iscenter of primary symbol Symbols in plan—position is atbottom of symbol Point symbols Point symbols—approximatepositions Kilometer(s)Meter(s)Decimeter(s)Centimeter(s)Millimeter(s) International nautical mile(s)(1852m), sea mile(s)Foot / FeetFathom(s)
Obs Spot St M 32 Y Bn (46)
MAST Mast Mi^
NM
7 7
Position of an elevationor control point Canal and distance pointwith no mark Canal and distance point Position of a pointfeature
ECDIS follows the paper chart convention for the SRVLWLRQRIV\PEROVH[FHSWIRUVLPSOL¿HGV\PEROVIRU buoys and beacons (see Q 1). ECDIS indicates approximate position only forwrecks, obstructions, islets and shoreline features. Supplementary national symbols
a–m
13
B^
Positions, Distances, Directions, Compass
ECDIS
No.^
INT^
Description
NOAA
NGA^
Other NGA
h^
Hour(s)
hr
m^
min^
Minute(s) of time
s^
sec^
Second(s) of time
kn^
Knot(s)
t^
Ton(s), Tonnage (weight)
cd^
Candela(s)
Magnetic Compass
Supplementary national symbols
n
Note of magnetic variation,in position
Note of magnetic variation,out of position
Cursor pick site formagnetic variation ata point Cursor pick site formagnetic variationover an area
14
B^ c i
Positions, Distances, Directions, Compass No.^
INT
Local Magnetic Anomaly
82.^
(see Note)
Supplementary National Symbols^ a^ b^ d^ e^ f^ g^ h^ j^ k^ m^ o^ p
Description Local magnetic anomalyWithin the enclosed area themagnetic variation may deviatefrom the normal by the valueshown Local magnetic anomalyWhere the area affected cannot EHHDVLO\GH¿QHGDOHJHQGRQO\ is shown at the position Square meter(s) Cubic meter(s) Inch(es) Yard(s) Statute mile(s) Microsecond(s) Hertz Kilohertz Megahertz Cycles/second Kilocycle(s) Megacycle(s) Ton(s) (U.S. short ton) (2,000lbs) Benchmark Variation
NOAA
NGA
LOCAL MAGNETIC
LOCAL MAGNETIC
DISTURBANCE
ANOMALY
(see note)
(see note) (^2) m (^3) m (^) in yd St M^
St Mi μsec^
μs Hz kHz MHz cps
c/s kc Mc T BM var^
VAR
Other NGA LOCAL MAGNETIC DISTURBANCE
(see note)
ECDIS^ Cursor pick site formagnetic anomaly alonga line or over an area^ Cursor pick site formagnetic anomaly ata point Varn^
Magnetic variation
l 16
Positions, Distances, Directions, Compass
B
No.^
INT^
Description
NOAA
NGA^
Other NGA
ECDIS
q^
Magnetic
mag
r^
Bearing
brg
s^
True^
T
17
Natural Features
C
No.^
INT^
Description
NOAA
NGA^
Other NGA
ECDIS
Relief
Supplementary national symbols: e–g
3ODQHRIUHIHUHQFHIRUKHLJKWVĺ+^10
259 (^250200150) 100
200100
50
&RQWRXUOLQHVZLWKYDOXHVDQG spot height
109 m
(OHYDWLRQFRQWRXUZLWK VSRWKHLJKWFRQWRXU YDOXHLVREWDLQHGE\ cursor pick
Spot heights
119 m^
3RVLWLRQRIDQHOHYDWLRQ or control point
Approximate contour lines with YDOXHVDQGDSSUR[LPDWHKHLJKW
109 m
(OHYDWLRQFRQWRXUZLWK VSRWKHLJKWFRQWRXU YDOXHLVREWDLQHGE\ cursor pick
Form lines with spot height Approximate height of top of WUHHV DERYHKHLJKWGDWXP
135 TT^
Approximate height of trees is REWDLQHGE\FXUVRUSLFN
5LYHU6WUHDP
5LYHU
,QWHUPLWWHQWULYHULQWHUPLWWHQW lake
† (^14) :DWHU)HDWXUHV/DYD 20 21
19
C^
Natural Features No.^
INT^
Description
NOAA
NGA^
Other NGA
ECDIS
5DSLGV:DWHUIDOOV
5DSLGV Waterfall :DWHUIDOOYLVXDOO\ conspicuous
/DNHV^
/DNH
Salt pans
Glacier
Glacier
Continuous pattern for DQLFHDUHD JODFLHUHWF
/DYDÀRZ
Lava
Vegetation
Supplementary national symbols: i–t
:RRGVLQJHQHUDO
†
Wooded
/LQHRIWUHHV :RRGHGDUHD
20
