"This part of IEC 62047 defines terms@ definitions@ essential ratings and characteristics@ and measuring methods of electronic compasses. This standard applies to electronic compasses composed of magnetic sensors and acceleration sensors@ or magnetic sensors alone. This standard applies to electronic compasses for mobile electronic equipment. For marine electronic compasses@ see ISO 11606. Electronic compasses are called ""e-compasses"" for short. Types of e-compasses are: 2-axis e-compasses@ 3-axis e-compasses@ 6-axis e-compasses@ etc.@ all of which are covered by this standard."