GLONIC

Altimeters; Compasses for measuring; Distance measuring apparatus; Infrared detectors; Lasers for measuring; Length measuring gauges; Levelling rods; Magnetic compasses for surveying; Marine depth finders; Measuring rulers; Meteorological instruments; Needles for surveying compasses; Radar detectors; Slope indicators; Spirit levels; Squares for measuring; Surveying instruments; Surveying machines and instruments; Surveyors' levels; X-Y plotters