The aviation safety factor is also one of the conditions for realizing better airport services. One of them is the Swing Compass. The function of the compass is to show the direction of flight of the aircraft (heading) related to the four cardinal points, namely North, South, East and West. Establish a fixed reference for all kinds of observations and calculations needed in navigation, such as; positioning by cross-bearing, track, or measuring drift.
The compass is an important navigational instrument for cross-country flying over uncharted territory or in bad weather. One of the things to support this is the need to do a Magnetic Field Mapping study in the IMIP Special Airport area in the area of the compass swing area development plan in order to get an overview of the location where the Compass Swing area will be built which aims to provide guidelines in the form of information needed for development and the priority step that must be carried out is in the form of a low magnetic field standard for the Compass Swing area.
The geomagnetic method is part of the science of geophysics that utilizes the magnetic properties of the earth which are often used for exploration and investigation of geological objects and subsurface objects based on the magnetic properties or magnetic susceptibility of objects or objects on the surface and below the earth's surface, so that the effectiveness of this method depends on the magnetic contrast of subsurface objects. The Earth has a natural magnetic field that is formed due to the movement of the earth's electric currents in the Earth's core with a magnitude and direction of inclination that varies depending on the Earth's magnetic latitude.
The instrument used is the Proton Precision Magnetometer model GSM 19T product of GEM System Inc. Supporting equipment used in survey activities is a handheld GPS for navigation of measurement points, a pocket camera as a photo documentation tool, and a note book. Three magnetometers are used with details of use, namely one unit for measuring magnetic fields at the base station and two units for measuring magnetic fields at measuring points as a rover magnetometer.