A station number is used to indicate specific measures distances from the datum and/or other points identified by the manufacturer to the points in or on the aircraft.
A station number is a number used to spot the number of inches from a datum or other point picked out by the manufacturer to a point in or on an aircraft. A datum is a point determined by an airplane manufacturer to calculate the weight and balance of the airplane. A station number is a reference point on the air-frame that represents a vertical section of the air-frame. It starts at a nominal point (usually a few inches) forward of the airplane and move in 1 inch intervals.
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