ENC电子海图符号说明
Quick Guide to ENC Symbols
ENC Symbol Explanation
Additional Information
5011 Ref
Generic isolated danger symbol – with less depth than user-selected safety contour or where the depth is unknown Wreck, rock or obstruction
K
Sounding of low accuracy
Equates to sounding of doubtful depth I2I14
6 stars 5 stars 4 stars 3 stars 2 stars U
A1A2B C D
All signifi cant seafl oor features detected; very high accuracy survey All signifi cant seafl oor features detected; high accuracy survey U
ncharted features dangerous to navigation are not expected but may exist; medium accuracy survey
Depth anomalies may be expected; low accuracy survey or passage soundings Large depth anomalies may be expected; poor quality data Quality of bathymetry yet to be assessed
Caution area where a specifi c caution note applies
Refer to cursor enquiry to access additional information Refer to ECDIS Chart 1 for more examples
N64
Dredged area deeper than safety contour Darker blue indicates water shoaler than safety contour
Refer to cursor enquiry for more information
I20
Vertical lines indicate areas of charted data at signifi cantly smaller scale than main display Zoom out until vertical lines disappear to view at scale
appropriate to data
Indicates boundary between IALA A and B buoyage systems
See NP735
Isolated query indicates insuffi cient information to symbolise the feature
Query associated with symbol indicates absence of a mandatory attribute, such as beaco
n shape, direction or orientation Query may appear alone at a point, on a line or in a defi ned area. Further information may be obtained from cursor enquiry of the query Q80H40-43M27.2
AIS aid to navigation with no physical structure and Virtual AIS aid to navigation ECDIS / ENC based symbol
Limit between area of unoffi cial vector data and offi cial ENC data, marked by orange pecked line – pecks angled towards unoffi cial vector data
May be shown the other way around on older ECDIS.Within areas of non-ENC data, an alternative, offi cial chart must be used for navigation
U
A
B
A
B
ENC Symbol Explanation
Additional Information
5011 Ref
Indicates that an additional information note or picture fi le is available
The information, note or graphic can
be found using cursor enquiryobject to
Non-tidal current direction H42Spring tide – E bb
Flood H41
H40Light vessel/lightfl oat
P6Q30Daymarks
Q82-126
New Object – Point New Object – Line New Object – Area
New type of feature not yet known
to ECDIS – further information available by cursor enquiry
Symbol setting on ECDIS
For details of the IALA Maritime Buoyage System. Refer to NP 735
Simplifi ed
Traditional
Lateral beacons – red/green IALA applicable system Lateral conical buoys
- red/green, according to applicable IALA system IALA applicable system
Q130.1
Lateral can buoys – red/green
IALA applicable system Q130.1Cardinal marks north/east/south/west
Q130.3
Isolated danger marks Q130.4
Safe water buoy Q130.5
Special marks
Shape/topmarks are optional – colour yellow
Q130.6
Special purpose buoys, for example; TSS lane markers Shape/topmarks optional – colour yellow
Q130.6
Buoy – mooring
Q40

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