30.       FL150 ISA

            = +15 – (2º x 15)

            ISA   = -15ºC

            OAT =  -5ºC                       14,010’                       14,010

            Dev  = +10ºC                                       4 x 14 x +10 = 560’

                                                                                          14,570

                                        FL150                                                        14,570’

                                                                                                            +720’

                                                          720’          990’                        15,290’

 

                                                                                                                        QNH 1003

                                                   10 x 27 = 270’

 

                                                                                                                        1013 hPa