non-precision approach
Word Rarity
Rare
Frequency: Zipf frequency 3.94 in modern English
33
Scrabble Score
20
Letters
6
Syllables
10
Unique Chars
Meaning
noun
An instrument approach using a guidance system that provides only horizontal, and not vertical, guidance (such as VOR, NDB, or localizer navigation), requiring the pilot to manually maintain terrain clearance by flying at a predefined safe altitude for each segment of the approach by reference to their altimeter.