Cursors allow doing measurements that are independent of the graticule. This plane is therefore accessible as a location for a graticule or micrometer crosswires. These cursors are more accurate than visual estimates referring to graticule lines. The obverse depicts a triskelion superimposed over a graticule surrounded by a laurel wreath. The grid formed by lines of latitude and longitude is known as a "graticule". This is also used as the base for the word graticule, passing through French. III reflector gunsight, which projected the sighting graticule directly onto the windscreen, or the Mk. Lines of constant latitude and longitude together constitute a graticule on the reference surface. A graticule is a piece that has lines for precise lengths etched into it. Most oscilloscopes have a graticule as part of the visual display, to facilitate measurements.