Chart No. 1 · N 12.1
Anchorage / anchorage area
Areas & limits
An anchor symbol marks a recognized anchorage; dashed limits enclose designated anchorage areas.
What it means
An anchor symbol marks an anchorage. A dashed limit with anchor symbols (often numbered or named) encloses a designated anchorage area; a bare anchor (N 10) is a reported anchorage without defined limits.
Why it matters
Charted anchorages exist because the holding, depth, and shelter are proven — check the nearby bottom-nature letters and soundings before letting go. In busy ports, some numbered areas are reserved for ships.