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.

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

• 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.

• 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.

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

• 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.

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

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