MAGNETIC COMPASS The magnetic compass gives directly the magnetic bearings of lines. The bearings may either be measured in the W С.В.sy stem or in Q.B system depending upon the form of the compass used. The bearings so measured are entirely independent on any other measurement. The general principle of all magnetic com pass depends … Read more Detail About Magnetic Compass, Prismatic Compass and Surveyor Compass
A hand level is a small levelling instrument which is held in hand when used for levelling. It consists of a rectangular tube, 100 to 150 mm long. A small level tube is mounted on the top of the tube. There is a small opening in the tube immediately below the level tube. The lower … Read more What is Hand Level and its use.