ATPL: How does scale change on a normal Mercator chart?
Domanda 240, General Navigation - ATPL - Airline Transport Pilot license
| Expands directly with the secant of the latitude. |
| Correct on the standard parallels, expands outside them, contracts within them. |
| Expands as the secant of the E/W great circle distance. |
| Expands as the secant^2 (1/2 co-latitude). |
