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US Buoyage

Special mark

Technical visualSpecial mark
Special markA yellow special mark beside a chart reference symbol and the instruction to consult the chart or relevant publication.SPECIAL MARK YELLOW
Special markA yellow special mark beside a chart reference symbol and the instruction to consult the chart or relevant publication. 121SPECIAL MARK2YELLOW

chart / publication defines purpose

Yellow identifies a special mark. Its purpose comes from the chart or relevant publication, not ordinary lateral meaning.

Appearance

Yellow.

Meaning

Marks a special area or feature whose meaning is determined from the chart or relevant publication.

Examples can include:

cable areas

pipelines

recreation zones

anchorage limits

data collection

special-purpose areas

A special mark has no ordinary lateral significance merely because it is yellow.

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