Statements given below are incorrect. Write the correct statements.
A tracing needle is used by the sailor for navigation.

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Solution

Earth also behaves as a magnet.
A magnet when suspended freely aligns itself in the North-South direction.
Magnet has a directive property.
Thus, magnetic needle is used in compass for indicating directions.
So, the correct statement is,
A magnetic needle is used by the sailor for navigation.

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