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9.1 Indledning………… ....................................................................................... 797
9.2 Jordens form og gradnet ........................................................................... 799
9.2.1 Længde- og breddegrader .................................................................... 799
9.2.1.1 Gradnettet ........................................................................................800
9.2.1.2 Breddeparalleller og breddegrader ..................................................800
9.2.1.3 Meridianer og længdegrader ............................................................800
9.2.1.4 Positionsangivelse .............................................................................801
9.2.1.5 Afstandsberegning ved hjælp af koordinater ...................................802
9.3 Tid……………………………. .............................................................................. 804
9.3.1 Central Europæisk tid (CET) .................................................................. 805
9.3.2 Datolinjen .............................................................................................. 805
9.3.2.1 Den internationale datolinje .............................................................805
9.3.2.2 Tidszone ............................................................................................806
9.3.3 UCT-tid /zulu-tid og lokal tid ................................................................. 806
9.3.4 Tid, hvor der må udføres VFR-flyvning ................................................. 807
9.3.4.1 Tusmørke og nat ................................................................................808
9.4 Flyvekort…………………… .............................................................................. 810
9.4.1 Korttegning ........................................................................................... 810
9.4.1.1 Krav til kort .......................................................................................811
9.4.1.2 Kort - projektionsmetoder ................................................................812
9.4.1.3 Lamberts konforme koniske projektion ...........................................812
9.4.1.4 Mercatorprojektionen ......................................................................813
9.4.1.5 Gnomonisk projektion ......................................................................814
9.4.2 Storcirkler og kompaslinjer ................................................................... 815
9.4.2.1 Storcirkler .........................................................................................815
9.4.2.2 Lillecirkler ..........................................................................................816
9.4.2.3 Kompaslinjer .....................................................................................816
9.4.3 ICAO-kortet ........................................................................................... 818
9.4.3.1 Meridianer og breddeparalleller ......................................................818
Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 791
