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9.1 Indledning………… ....................................................................................... 367

9.2 Jordens form og gradnet ........................................................................... 369

9.2.1 Længde- og breddegrader .................................................................... 369
9.2.1.1 Gradnettet ........................................................................................370

9.2.1.2 Breddeparalleller og breddegrader ..................................................370

9.2.1.3 Meridianer og længdegrader ............................................................370
9.2.1.4 Positionsangivelse .............................................................................371

9.2.1.5 Afstandsberegning ved hjælp af koordinater ...................................372
9.3 Tid……………………………. .............................................................................. 374

9.3.1 Central Europæisk tid (CET) .................................................................. 375

9.3.2 Datolinjen .............................................................................................. 375
9.3.2.1 Den internationale datolinje .............................................................375

9.3.2.2 Tidszone ............................................................................................376

9.3.3 UCT-tid /zulu-tid og lokal tid ................................................................. 376
9.3.4 Tid, hvor der må udføres VFR-flyvning ................................................. 377

9.3.4.1 Tusmørke og nat ................................................................................378

9.4 Flyvekort…………………… .............................................................................. 380

9.4.1 Korttegning ........................................................................................... 380

9.4.1.1 Krav til kort .......................................................................................381
9.4.1.2 Kort - projektionsmetoder ................................................................382

9.4.1.3 Lamberts konforme koniske projektion ...........................................382

9.4.1.4 Mercatorprojektionen ......................................................................383
9.4.1.5 Gnomonisk projektion ......................................................................384

9.4.2 Storcirkler og kompaslinjer ................................................................... 385

9.4.2.1 Storcirkler .........................................................................................385
9.4.2.2 Lillecirkler ..........................................................................................386

9.4.2.3 Kompaslinjer .....................................................................................386

9.4.3 ICAO-kortet ........................................................................................... 388

9.4.3.1 Meridianer og breddeparalleller ......................................................388

Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 361