Compass (architecture)

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In carpentry, architecture, and shipbuilding, a compass is a curve (or bent) circular form. A compass plane is a craftsman plane, which has a convex direction length on the underside, for smoothing the concave faces of curved woodwork. A Compass saw (or fret saw or keyhole saw) is a narrow blade a saw that cuts a curve. A compass timber is a curved (or crooked) timber. A compass window is a circular bay window (or oriel window).

A Surveyor's compass (or circumferentor) is a measuring instrument used in surveying horizontal angles.