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460 - SPL - Which are the official basic units for horizontal distances used in aeronautical navigation and their abbreviations?

Question 460 - Navigation - SPL - Sailplane Pilot License

Nautical miles (NM), kilometers (km)
Land miles (SM), sea miles (NM)
Yards (yd), meters (m)
Feet (ft), inches (in)

Training tests and timed exam simulations SPL - Sailplane Pilot License