Which term is used to indicate specific measured distances from the datum and/or other points identified by the manufacturer, to points in or on the aircraft?

Which term is used to indicate specific measured distances from the datum and/or other points identified by the manufacturer, to points in or on the aircraft?

• A. Station Numbers
• B. Zone Numbers
• C. Reference Numbers
• D. Plot Numbers

Answer: (A)

Measuring exact locations along the aircraft length uses station numbers. A datum is a fixed reference point or line, and distances from that point to features on the aircraft are expressed as station values. This lets technicians specify precise positions for frames, fittings, or inspection points—e.g., a feature located at a particular station means it lies a defined distance aft or forward of the datum. Zone numbers identify broad areas rather than exact locations, and reference or plot numbers are used for other documentation purposes, not to convey exact longitudinal positions. So the term that indicates those specific measured distances from the datum to points on the aircraft is station numbers.

Measuring exact locations along the aircraft length uses station numbers. A datum is a fixed reference point or line, and distances from that point to features on the aircraft are expressed as station values. This lets technicians specify precise positions for frames, fittings, or inspection points—e.g., a feature located at a particular station means it lies a defined distance aft or forward of the datum. Zone numbers identify broad areas rather than exact locations, and reference or plot numbers are used for other documentation purposes, not to convey exact longitudinal positions. So the term that indicates those specific measured distances from the datum to points on the aircraft is station numbers.