Quick Guide to ENC Symbols - Admiralty

1 ENC SymbolExplanationAdditional Information5011 RefGeneric isolated danger symbol with less depth than user-selected safety contour or where the depth is unknownWreck, rock or obstructionKSounding of low accuracyEquates to sounding of doubtful depthI2I14U6 stars5 stars4 stars 3 stars 2 starsU A1A2 BCDAll signifi cant seafl oor features detected; very high accuracy surveyAll signifi cant seafl oor features detected; high accuracy survey Uncharted features dangerous to navigation are not expected but may exist; medium accuracy surveyDepth anomalies may be expected; low accuracy survey or passage soundingsLarge depth anomalies may be expected; poor quality dataQuality of bathymetry yet to be assessedCaution area where a specifi c caution note appliesRefer to cursor enquiry to access additional informationRefer to ECDIS Chart 1 for more examplesN27 Dredged area deeper than safety contourDarker blue indicates water shoaler than safety contourRefer to cursor enquiry for more informationI20 Vertical lines indicate areas of charted data at signifi cantly smaller scale than main displayZoom out until vertical lines disappear to view at scale appropriate to dataABABI ndicates boundary between IALA A and B buoyage systemsSee NP735 Isolated query indicates insuffi cient information to symbolise the featureQuery associated with symbol indicates absence of a mandatory attribute, such as beacon shape, direction or orientationQuery may appear alone at a point, on a line or in a defi ned area.

2 Further information may be obtained from cursor enquiry of the between area of unoffi cial vector data and offi cial ENC data, marked by orange pecked line pecks angled towards unoffi cial vector dataMay be shown the other way around on older areas of non-ENC data, an alternative, offi cial chart must be used for navigationENC SymbolExplanationAdditional Information5011 RefIndicates that an additional information note or picture fi le is availableThe information, note or graphic can be found using cursor enquiryNon-tidal current directionH42 Spring tide EbbFloodH41H40 Light vessel/lightfl oatP6Q30 DaymarksQ82-12 6 New Object PointNew Object LineNew Object AreaNew type of feature not yet known to ECDIS further information available by cursor enquirySymbol setting on ECDISFor details of the IALA Maritime Buoyage System. Refer to NP 735 Simplifi edTraditionalLateral beacons red/greenIALA applicable systemLateral conical buoys - red/green, according to applicable IALA systemIALA applicable can buoys red/greenIALA applicable marks north/east/south/west (Cardinal mark north shown for Traditional) Isolated danger water Special marksShape/topmarks are optional colour Special purpose buoys, for example; TSS lane markersShape/topmarks optional colour Buoy mooringQ40 Quick Guide to ENC Symbols (Third Edition)