Octangonal Cross Staff

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.

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.

Description

We offer a wide range of very high quality Plane Table Accessories that are suitable for maps preparation and recording topography in various engineering surveys. This outfit consists of a plane table board with a fitted tripod. These products undergo various quality tests at each level of its production to ensure good quality and flawless performances. These products are basically used in the construction industry for the purpose for surveying the land for commercial use.

Features :

• Export quality. • Reasonable price. • Customer centric organization. • Customizable.

Specifications:

• Size: 54 X 34 X 22 + 8 CM. • Material: Green Bamboo, Natural and Environmental.

Features

• Excellent shockproof function. • Exclusive closed magnetic field, magnetically-dampened compensator. • Friction-braked rotation and endless horizontal drive. • Prism for viewing circular vial. • Water, dust and dirt proof. • Comes with a years warranty. • Full back up and repair service available.