Generic isolated danger symbol – with less depth than user-selected safety contour or where the depth is unknown

Sounding of low accuracy

Caution area where a specific caution note applies

Dredged area deeper than safety contour Darker blue indicates water shoaler than safety contour

Indicates boundary between IALA A and B buoyage systems

Isolated query indicates insufficient information to symbolise the feature Query associated with symbol indicates absence of a mandatory attribute, such as beacon shape, direction or orientation

Limit between area of unofficial vector data and official ENC data, marked by orange pecked line – pecks angled towards unofficial vector data

Vertical lines indicate areas of charted data at significantly smaller scale than main display

Indicates that an additional information note or picture file is available

Non-tidal current direction

Spring tide – Ebb Flood

Light vessel/lightfloat

Daymarks

New Object – Point New Object – Line New Object – Area

Lateral beacons – red/green

Lateral conical buoys - red/green, according to applicable IALA system

Lateral can buoys – red/green

Cardinal marks north/east/ south/west (Cardinal mark north shown for Traditional)

Isolated danger marks

Safe water buoy

Special marks

Special purpose buoys, for example; TSS lane markers

Buoy – mooring

Full area search. Significant seafloor features detected and depths measured.

Full area search. Significant seafloor features detected and depths measured.

Systematic survey, but some uncharted hazardous features may exist but are not expected.

Depth anomalies may be expected.

Large depth anomalies may be expected.

Not assessed