A shank with a crossbar and two curved arms, marking anchorages and maritime things generally.
Also known as: Anchor, Ship anchor symbol
On a chart an anchor marks an anchorage — somewhere a vessel may anchor. Away from charts it has become a general mark for anything maritime, and a struck-through anchor means the opposite of the plain one.
Marks an anchorage on a nautical chart: a place where a vessel may anchor, with the chart showing depth and holding ground nearby.
Contexts: Navigation
Is struck through by a diagonal to mark an area where anchoring is prohibited, usually over a cable or pipeline.
Contexts: Navigation
Serves outside charts as a general mark for anything maritime — harbours, marinas, ports on road signage — where it carries no chart meaning at all.
Contexts: Public information
A vertical shank with a ring at the top, a horizontal crossbar below it, and two arms curving upward and outward from the foot, each ending in a pointed fluke.
Both are chart symbols of the internationally agreed set.