Measurers

Pace count beads or ranger beads is a manual counting tool used to keep track of distance traveled through a pace count. It is used in military...

Pace count beads or ranger beads is a manual counting tool used to keep track of distance traveled through a pace count. It is used in military land navigation or orienteering.

An opisometer, also called a curvimeter, meilograph, or map measurer, is an instrument for measuring the lengths of arbitrary curved lines. The instrument is most commonly used to measure the lengths of roads, rivers and other line features on maps.