Check the listing for details. Aluminium Telescopic Alidade Survey & Level Theodolite Transit with Wooden box. Condition: New. Listed at 149.99 USD. Description: New Aluminium Telescopic Alidade Surveying & Level Theodolite Transit Alidade A Telescopic Alidade is an instrument used to obtain the bearings of an object along with other information. It is a sophisticated device which gives accurate bearings. The optical system simultaneously projects the image of the compass card, together with a view of the spirit level, onto the optical view of the telescope. By this means, both the object and its bearing can be viewed at the same time through the alidade eyepiece. Our instrument has been tested extensively and found to be very accurate.Product Features Material : Brass, Aluminium & Glass A Telescopic Alidade is an instrument used to obtain the bearings of an object along with other information. It is a sophisticated device which gives accurate bearings. The optical system simultaneously projects the image of the compass card, together with a view of the spirit level, onto the optical view of the telescope. By this means, both the object and its bearing can be viewed at the same time through the alidade eyepiece. Our instrument has been tested extensively and found to be very accurate Look Photos For Actual Image Of Product.