Linked from

The 24 pages that link to Compass, each with the reason it gives.

• Dead reckoningRelated: A compass supplies directional information for estimating a vessel’s course.

• Degree (angle)Related: Bearings are often reported as degree measurements around a horizon.

• Magnetic dipoleBroader topic: Its needle behaves approximately as a magnetic dipole in the geomagnetic field.

• Age of SailRelated: The compass allowed ships to maintain a course when land was out of sight.

• MagnetoreceptionNarrower topic: Magnetoreception includes biological versions of the broader magnetic-compass principle.

• Earth's magnetic fieldRelated: A compass uses the horizontal direction of Earth's field to indicate magnetic north.

• Magnetic declinationRelated: Its north indication differs from map north by the local declination.

• Portolan chartRelated: The chart’s bearings were intended to be followed with compass readings.

• MagnetometerBroader topic: The compass is the simplest historically widespread magnetic-field instrument.

• Marine navigationRelated: It indicates direction when landmarks or electronic positioning are unavailable.

• Hans Christian ØrstedRelated: Its movable needle served as a sensitive indicator of the wire’s magnetic influence.

• OrienteeringRelated: A compass helps align the map and maintain direction between visible features.

• Rhumb lineRelated: A compass course can hold the fixed direction that defines a rhumb line.

• Cardinal directionRelated: Its marked dial lets travelers identify cardinal headings in the field.

• Compass roseRelated: Compasses supplied the directional reference that the rose represents.

• Chinese compassNarrower topic: The Chinese instrument is an early historical form within this broader family of devices.

• Flight instrumentsRelated: It supplies a magnetic reference against which heading indications can be checked.

• AlidadeCompared with: A compass indicates a reference direction; an alidade sights a chosen target and reads its angle.

• Piri ReisRelated: Magnetic bearings helped navigators follow the courses represented on nautical charts.

• History of navigationRelated: The compass made direction-finding possible without clear skies or visible landmarks.

• History of science and technology in ChinaBroader topic: Its navigational use helped connect Chinese invention with maritime expansion.

• East (direction)Related: Its marked directions let users identify east relative to magnetic north.

• History of geomagnetismBroader topic: Its practical use drove centuries of observation and correction of magnetic direction.

• Simone Niggli-LuderRelated: A compass helped maintain direction when terrain or vegetation obscured visual landmarks.