Definition
This is not a standalone aviation term. It is a fragment of a sentence taken from a larger explanation about aircraft station numbering, in which fuselage stations (used to locate components along the length of an aircraft) can be expressed in decimal form to allow finer positioning between whole-number stations. For example, a part located between station 100 and station 101 might be identified as station 100.5.
Plain English
Aircraft are measured in stations -- numbered points along the fuselage that show how far something is from a fixed reference point. When a part sits between two whole-number stations, decimals are used to pinpoint the exact location. So station 100.5 is halfway between station 100 and station 101.
Context Anchor
Seen in aircraft maintenance manuals, structural repair documents, parts diagrams, and location references for engines or other aircraft sections.
Derivation
Station comes from a Latin word meaning “standing place” or “position.” Decimal comes from Latin for “tenth.” Together, the idea is a position that can be broken into tenths, hundredths, or other decimal parts for a more exact location.
Why Pilots Care
Pilots and maintenance personnel use station numbers when reading weight and balance data, locating equipment in the airframe, or referring to a position in a maintenance document. Decimal stations let them describe a location precisely rather than rounding to the nearest whole station.
Analogy
Think of station numbers like the tick marks on a ruler. The whole numbers give you the main marks, and decimals are the small marks in between for when you need to be more exact.
Intuition Check
Do not read “station” here as a radio station, passenger station, or general workplace. In this context, a station is a measured location on the aircraft, and the decimal makes that location more exact.
Example Sentence 1
The repair was logged at fuselage station 247.5, halfway between stations 247 and 248.
Example Sentence 2
Decimal numbering allows precise identification of conditions between engine stations 3 and 4.