Early dip circles were not accurate and gave poor results.
2.
Improvements which made the dip circle a practical aid for polar navigation were made by Robert Were Fox FRS, who developed in the 1830s the first dip circle that could be used on board a moving ship.
3.
Improvements which made the dip circle a practical aid for polar navigation were made by Robert Were Fox FRS, who developed in the 1830s the first dip circle that could be used on board a moving ship.
परिभाषा
a measuring instrument for measuring the angle of magnetic dip (as from an airplane) पर्याय: inclinometer,
मोबाइल