Qibla compass
Encyclopedia
A qibla compass or qiblah compass (sometimes also called qibla/qiblah indicator) is a modified compass
Compass
A compass is a navigational instrument that shows directions in a frame of reference that is stationary relative to the surface of the earth. The frame of reference defines the four cardinal directions – north, south, east, and west. Intermediate directions are also defined...

 used by Muslims to indicate the direction to face to perform ritual parayers. In Islam
Islam
Islam . The most common are and .   : Arabic pronunciation varies regionally. The first vowel ranges from ~~. The second vowel ranges from ~~~...

, this direction is called qibla
Qibla
The Qiblah , also transliterated as Qibla, Kiblah or Kibla, is the direction that should be faced when a Muslim prays during salah...

, and points towards the city of Mecca
Mecca
Mecca is a city in the Hijaz and the capital of Makkah province in Saudi Arabia. The city is located inland from Jeddah in a narrow valley at a height of above sea level...

 and specifically to the Ka'abah
Kaaba
The Kaaba is a cuboid-shaped building in Mecca, Saudi Arabia, and is the most sacred site in Islam. The Qur'an states that the Kaaba was constructed by Abraham, or Ibraheem, in Arabic, and his son Ishmael, or Ismaeel, as said in Arabic, after he had settled in Arabia. The building has a mosque...

. While the compass, like any other compass, points north
North
North is a noun, adjective, or adverb indicating direction or geography.North is one of the four cardinal directions or compass points. It is the opposite of south and is perpendicular to east and west.By convention, the top side of a map is north....

, the direction of prayer is indicated by marks on the perimeter of the dial, corresponding to different cities, or by a second pointer set by the user according to their own location. Al-Biruni wrote his book (Kitab Tahdid al-Amakin, or the demarcation of the coordinates of cities) to determine the qibla. To determine the proper direction, one has to know with some precision both the longitude and latitude of one's own location and those of Mecca, the city toward which one must face. Once that is determined, the values are applied to a spherical triangle, and the angle from the local meridian to the required direction of Mecca can be determined. The problem admits of more than one method of solution, and Al-Biruni did his share in supplying the various methods in this book.
Qibla indicators were made after al-Kindi in various forms. The indicator usually comprises a round brass box with a hinged lid and an inset magnetic compass. A list of important Islamic places with their longitudes, latitudes, is inscribed in Arabic on all sides of the box. The compass has a blued steel needle with an open circle to indicate North. It is surmounted by a brass pyramidal pivot and a glass plate covers all. A brass ring over the rim of the compass carries a degree circle numbered in 'abjad' numerals and the cardinal points are marked. The folding triangular gnomon is supported by a decorative open-work motif. The lid of the box is secured by a hook fastener. The instrument serves the user to determine the correct 'qibla' - the direction to which Muslims turn in prayer to face the Ka'ba in Mecca.
Ornate qibla compasses date back at least to the 18th century. Some modern versions use digital
Digital
A digital system is a data technology that uses discrete values. By contrast, non-digital systems use a continuous range of values to represent information...

 readout instead of a magnetic pointer.

Some qibla compasses also include a tally counter
Tally counter
-Description:A tally counter is usually made of metal and is circular in shape. Part of the circle is flattened out and contains a piece of clear plastic. Inside the counter are a number of rings with the numbers from 0 to 9 in descending order going clockwise. Most counters have four such rings,...

, used to count the repetition of various du'a said after prayer.

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