EASA NAV(A)basic
Which units and abbreviations are identified in the material as basic horizontal-distance units for aeronautical navigation?
Answer
Nautical miles (NM), kilometres (km)
Explanation
The material identifies **nautical miles (NM)** and **kilometres (km)** as basic horizontal-distance units. Aeronautical route and speed calculations commonly use NM and knots. **Key takeaway:** Know both NM and km and convert carefully. **Glossary:** Knot: one nautical mile per hour.
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