Why is the last zero omitted when designating runway numbers?

Why is the last zero omitted when designating runway numbers?

• A. To simplify calculations
• B. For convenience
• C. To indicate bearing
• D. To comply with standard

Answer: (B)

Runway numbers are based on the magnetic direction the runway points to, rounded to the nearest ten degrees and shown as a two-digit figure. The trailing zero is dropped to keep the designation short and easy to read and communicate, which is especially important on signs, charts, and in radio transmissions. For example, a runway oriented toward about 270 degrees is labeled 27, and one near 90 degrees is labeled 09. This concise form preserves the directional meaning while reducing clutter, making quick recognition and clear communication more reliable. The other ideas miss the practical reason: the label isn’t about simplifying calculations or about indicating bearing beyond reflecting the bearing in a compact form, and while it is a standardized convention, the driving point is convenience and readability.

Runway numbers are based on the magnetic direction the runway points to, rounded to the nearest ten degrees and shown as a two-digit figure. The trailing zero is dropped to keep the designation short and easy to read and communicate, which is especially important on signs, charts, and in radio transmissions. For example, a runway oriented toward about 270 degrees is labeled 27, and one near 90 degrees is labeled 09. This concise form preserves the directional meaning while reducing clutter, making quick recognition and clear communication more reliable. The other ideas miss the practical reason: the label isn’t about simplifying calculations or about indicating bearing beyond reflecting the bearing in a compact form, and while it is a standardized convention, the driving point is convenience and readability.