A French cross-staff has a magnetic compass at the top.

Related MCQs

• Due to the magnetic influence of the earth, the magnetic needle of the prismatic compass will be inclined downward towards the pole. This inclination of the needle with the horizontal is known as
• The prismatic compass and surveyor’s compass
• Prismatic compass is considered more accurate than a surveyor's compass, because
• Prismatic compass gives more accuracy than surveyors compass.
• Which meridian direction can be established with the help of a magnetic compass?
• In order to fix up the directions of the survey lines in the compass survey, the horizontal angle between the survey line and a fixed line of reference is measured. This fixed line reference is the magnetic meridian.
• If the magnetic bearing of the sun at a place at noon in southern hemisphere is 167°, the magnetic declination at thatplace is
• True bearing of a line = magnetic bearing + magnetic declination If declination is towards………
• If magnetic bearing of line AB is 279’ and magnetic declinations is 7’W.Find the true bearing.
• When magnetic meridian is right side to true meridian, then Magnetic Declination is said to be _________