A buoy marking the location of a bar at the mouth of a river on approach to a harbor

Related Terms

INDEX ARM

A slender bar carrying an index; particularly the bar which pivots at the center of curvature of the arc of a marine sextant and carries the index and the vernier or micrometer.

BAR PILOT

A bar pilot guides ships over the dangerous sandbars at the mouth of rivers and bays.

BAR

A Large mass of sand or earth, formed by the surge of the sea. They are mostly found at the entrances of great rivers or havens, and often render navigation extremely dangerous, but confer tranquility once inside.

LIGHT IRON

An iron bar mounted near the main shrouds which support the navigation lights

LEEBOARD IRON

The iron bar that run from the mainmast case to the head of each leeboard, which they support.

MAGNETIC NEEDLE

A small, slender, magnetized bar which tends to align itself with magnetic lines of force.

BEARING BAR

An instrument for measuring bearings, particularly a device consisting of a slender bar with a vane at each end, and designed to fit over a central pivot in the glass cover of a magnetic compass. See also AZIMUTH BAR.

BARRIER BEACH

A bar essentially parallel to the shore, the crest of which is above high water

BAYMOUTH BAR

A bar extending partially or entirely across the mouth of a bay

BEAM COMPASS

Compass for drawing circles of large diameter. In its usual form it consists of a bar with sliding holders for points, pencils, or pens which can be set at any desired position

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