Magnetic dip is a measurement of the angle between the（）.

A . If the quadrantal spheres are out as far as possible replace them with smaller spheres B . If the quadrantal spheres are in as far as possible remove one of the spheres C . If the quadrantal spheres are in as far as possible replace them with smaller spheres D . If the quadrantal spheres are out as far as possible，move the quadrantal spheres i

A . An agonic line B . The magnetic equator C . A magnetic meridian D . All of the above

A . variation B . deviation C . compass error D . drift

A . be shielded from direct sunlight B . be locked into a constant heading C . have any air bubbles replaced with nitrogen D . have the compensating magnets removed

A . fore-and-aft and athwartships magnets B . dip needle and heeling magnet C . heeling magnet and Flinders bar D . Flinders bar and quadrantal sphere

A . water B . babbitt C . iron or steel D . acid

A . zero B . equal to variation C . eliminated by adjusting the compass D . constant at any geographical locatio

A . Move the quadrantal spheres closer to the compass B . Raise the heeling magnet if the red end is up C . Remove some of the Flinders bar D . Raise or lower the athwartship magnet

A . the angle between the horizontal and the line of sight to the visible horizon B . index error C . parallax D . terrestrial refractio

A . Heeling magnet B . Flinders bar C . Fore-and-aft magnets D . All of the above can be set on magnetic east or magnetic west heading

A . If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should add some magnets. B . If the blue ends of the magnets are aft you should lower the fore-and-aft tray C . If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should reverse the magnets D . If the blue ends of the magnets are forward，and the fore-and-aft tray is at the bottom，you should add some magnet

A . If the quadrantal spheres are all the way out，replace them with smaller spheres B . If the quadrantal spheres are all the way in，replace them with larger spheres C . If the quadrantal spheres are all of the way out，move the spheres in D . If the quadrantal spheres are all the way out，replace them with larger spheres.

A . increases B . remains the same C . decreases D . is unimportant and may be neglected

A . nonmagnetic B . weatherproof C . corrosion resistant D . capable of being permanently affixed to the vessel

A . Along the magnetic equator B . Connected by the isoclinal line C . The isopors D . The magnetic pole

A . Compass error and variation are equal B . Compass north will be true north C . Variation will equal deviation D . There will be no compass error

A . elevation B . magnetic angle C . vertical angle D . di

A . Gray lines on the uppermost inset chart B . Red lines on the main body of the chart C . In parenthesis on the lines of equal magnetic variation D . Annual rate of change is not show

A . Magnetic materials of the same polarity repel each other and those of opposite polarity attract B . The Earth's magnetic lines of force are parallel to the surface of the Earth C . Magnetic meridians connect points of equal magnetic variation D . The compass needle(s) will，when properly compensated，lie parallel to the isogonic lines of the Earth

A . catenary B . step C . shock dip D . bight

A . It compensates for the error caused by the vertical component of the Earth's magnetic field B . It compensates for error caused by the heeling of a vessel C . It compensates for quadrantal deviation D . It is only needed in equatorial water

A . opposite polarity B . the same polarity C . negative polarity D . positive polarity