Aircraft flies from 139º46.3’E to 180ºE/W: this is a change of longitude of 40º13.7’ to the East.   The longitude indicated will change by the same amount in the same direction: i.e. from 139º46.3’W to 099º32.6’W

           

                                                      180º00’E/W

 

                              139º46.3’W                                        139º46.3’E

 

 

                     099º32.6’W

 

 

 

 

 

 

                                                            000ºE/W