Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Object Groupings and Systems (hierarchy name)
4. systems (equipment)
5. [systems by function]
6. geographic systems

Anotations

Scope note:

A system of marking locations using an electronic device or “marker,” which is buried at a site. Locators are used later to transmit a signal to the buried marker, which returns a signal that indicates the marker’s exact position. Originally developed for utility companies to quickly and accurately locate buried features such as power, water, gas, and fiber optic lines, the technology has potential for use in cultural resource management.