| Class | Angles | The types of angles. | 
    
    | Class | Directions | The four cardinal directions (north, east, south, west). | 
    
    | Class | BasePositioningReceiver | A base positioning receiver. | 
    
    | Class | InvalidSentence | An exception raised when a sentence is invalid. | 
    
    | Class | InvalidChecksum | An exception raised when the checksum of a sentence is invalid. | 
    
    | Class | Angle | An object representing an angle. | 
    
    | Class | Heading | The heading of a mobile object. | 
    
    | Class | Coordinate | A coordinate. | 
    
    | Class | Altitude | An altitude. | 
    
    | Class | Speed | The speed (rate of movement) of a mobile object. | 
    
    | Class | Climb | The climb ("vertical speed") of an object. | 
    
    | Class | PositionError | Position error information. | 
    
    | Class | BeaconInformation | Information about positioning beacons (a generalized term for the 
reference objects that help you determine your position, such as satellites
or cell towers). | 
    
    | Class | PositioningBeacon | A positioning beacon. | 
    
    | Class | Satellite | A satellite. | 
    
    | Class | _BaseSpeed | An object representing the abstract concept of the speed (rate of 
movement) of a mobile object. |