Reference

Chart Legend

Understand every symbol on your nautical charts. Moorion uses the international standard IHO S-52 symbology for consistent, professional-grade chart reading.

Depth Contours

Lines connecting points of equal depth below chart datum

━━Depth contour (0m)

━ ━Depth contour (5m)

━·━·Depth contour (10m)

━━━Depth contour (20m+)

Land & Coastline

Coastline features and land-based reference points

▬▬▬Coastline (mean high water)

- - -Coastline (approximate)

▮Land area

▲Elevation / summit

Navigation Aids

Buoys, beacons, and markers for safe passage

⬡ RRed lateral buoy (port hand)

⬢ GGreen lateral buoy (starboard hand)

◇ YBYellow special mark

● WSafe water mark

◆ BWIsolated danger mark

Anchorage

Designated anchorages and mooring areas

⚓Anchorage (general)

⚓ QQuarantine anchorage

⚓ SSecured anchorage

○Mooring buoy

Submarine Cables

Undersea infrastructure and restricted areas

━━━━Submarine cable

─·─·─Pipeline / outfall

▓▓▓Dumping ground

////Spoil ground

Tidal Information

Current flows and tidal stream indicators

→ 2.1Tidal stream (knots, direction)

⇉ 1.5Spring tidal stream

→ 0.8Neap tidal stream

⊙Tide station reference

Moorion adheres to the International Hydrographic Organization (IHO) S-52 presentation library for electronic navigational charts. All symbols are rendered at the correct scale and orientation for your display.