Question 663Navigation General70% to pass
Magnets in the binnacles of magnetic compasses are used to reduce the effect of _______________.
AI Explanation
The correct answer is A) deviation.
Magnets in the binnacles of magnetic compasses are used to reduce the effect of deviation. Deviation is the deflection of a compass needle caused by the magnetic fields of the ship's metal hull and equipment. These magnets help to counteract the effects of this local magnetic interference, which can cause the compass to point in a direction other than true north. The other options, local attraction and variation, are related but distinct phenomena that the magnets do not address. Local attraction is the influence of nearby magnetic objects, while variation is the difference between true north and magnetic north.
Related Questions
#661 The permanent magnetism of a vessel may change in polarity due to _______________.#662 Magnets are placed in horizontal trays in the compass binnacle to compensate for the _______________.#664 Permanent magnetism is caused by _______________.#665 At the magnetic equator there is no induced magnetism in the vertical soft iron because _______________.#666 The greatest directive force is exerted on the magnetic compass when the _______________.