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Cross Staff
Description
The Cross-Staff was used at sea from the beginning of the 16th century until the first half of the 18th century. It was used to measure the sun's altitude, especially at the meridian passage. With the knowledge of the sun's declination, the mariner could then obtain his latitude. The staff is original, with the inscription. The cross pieces are replicas. Different cross pieces were used depending on the altitude. A different scale is on each side of the staff.
Electronic Digital Theodolite
Description
This cost-effective Electronic Digital Theodolite provides excellent performance, reliable quality and practical operation for any construction application. The body style is similar to a Topcon Digital Theodolite and is combined with easy to use operation. The smart appearance and reasonable structure is as attractive as its price. • Tribrach. • AA Rechargeable Batteries (4 each). • Lens Cap. • Operator's Manual. • Hard carrying case.
Plane Table
Description
The Plane Table Surveying Instruments include standard accessories like Trough Compass, Spirit level, Canvas cover, Plumbing Fork etc., and is also with a fitted tripod. Uses of Plane Table in Engineering Surveys: • Maps preparation • Recording topography Accessories included in Plane Table Surveying Instruments: • Plane Table Board 750 x 600 mm, thickness 22mm & 16mm • Carrying Bag for Board • Teak wood Polished Stand • Stand Rigid Brass Head & Plate, • Magnet Trough compass brass • Spirit Level brass • Sight van 24" • Plumbing Fork • Plumb Bob
Survey Compass
Description
• Compass survey is a method of surveying by taking bearings and linear distances to produce plan. • Bearing is measured using prismatic compass, while the linear distance is measured using measuring tape. • Bearing in compass surveying means angle is made by chain line or survey line by referring it to magnetic meridian or magnetic north.
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