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

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

Special marks

Isolated danger marks

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

Safe water buoy

Buoy – mooring

Spring tide – Ebb Flood

Indicates boundary between IALA A and B buoyage systems

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

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

Daymarks

Caution area where a specific caution note applies

Not assessed

Indicates that an additional information note or picture file is available

Sounding of low accuracy

Light vessel/lightfloat

Non-tidal current direction

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

Lateral beacons – red/green

Special purpose buoys, for example; TSS lane markers

Large depth anomalies may be expected.

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

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

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

Lateral can buoys – red/green

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

Depth anomalies may be expected.