(Askeri) İNHİRAF MİNKALESİ; SAPMA İLETKİSİ: Haritayı cihetine koymakta kullanılan, yatay bir derece ölçeği ile bir dönüş noktasından ibaret alet. Bu alet vasıtasıyla, manyetik kuzey hattı bir harita üzerine çizilebilir
Some models of compasses have this feature to allow the user more flexibility in using the compass with a map Bearings can be more easily plotted with the protractor
A protractor is a flat, semi-circular piece of plastic or metal which is used for measuring angles. Instrument for constructing and measuring plane angles. The simplest protractor is a semicircular disk marked in degrees from 0° to 180°. A more complex protractor, for plotting position on navigation charts, is called a three-arm protractor, or station pointer, and consists of a circular scale connected to three arms. The centre arm is fixed, while the outer two can be rotated to any desired angle relative to the centre one. A related instrument is the course protractor, which allows navigators to measure the angular distance between north and the course plotted on a navigation chart
A mathematical instrument for laying down and measuring angles on paper, used in drawing or in plotting