Definition
A pattern of fine parallel lines drawn at an angle to a second set of fine parallel lines, used on engineering drawings, charts, and maps to indicate a sectional view, a specific surface, a restricted area, or a particular type of region.
Plain English
A shaded pattern made by two sets of crossing lines, used to mark or highlight an area on a drawing or chart.
Context Anchor
Seen in aircraft maintenance manuals, parts drawings, and training material that show the inside shape of a component.
Derivation
From 'cross' (across) and 'hatch,' which in drawing means to shade with fine parallel lines. The two sets of lines cross each other, hence cross-hatching.
Why Pilots Care
On charts, cross-hatched areas usually flag something that needs attention — restricted airspace, special use areas, or terrain features. Recognising the pattern helps the pilot read the chart quickly and accurately.
Analogy
It is like shading a sliced piece of cake in a drawing so the cut face is easy to see.
Intuition Check
Cross-hatching does not mean something is crossed out or canceled. In a technical drawing, it marks the solid surface exposed by an imaginary cut through the part.
Example Sentence 1
The mechanic checked the cross-hatching on the cylinder wall to confirm the honing pattern was correct.
Example Sentence 2
Different line angles in the cross-hatching showed where aluminum parts met steel components inside the cutaway view.