11. The FAMAS provides an alidade sight for launching the grenade from 75 or 100 metres. 12. This type of alidade could be found on a plane table, graphometer or similar instrument. 13. Alidades of this form are found on astrolabes, mariner's astrolabes and similar instruments.14. With modern technology, the name is applied to complete instruments such as the plane table alidade . 15. When an angle was measured, the circle and the division on which the alidade fell was noted. 16. The earliest alidades consisted of a bar, rod or similar component with a vane on each end. 17. There may also be a pointer or pointers on the alidade to indicate a position on a scale. 18. "' Alidade E "'is a representation of a very interesting design by Johannes Hevelius. 19. The FAMAS provides a built in alidade type aiming device for launching the grenade from 75 or 100 meters. 20. To use the alidade , the user sights an object and lines it up with the wires in each vane.
