Magnetic Compass Quiz

What is the main cause of induced magnetism in a ship?

• The Earth's magnetic field

• Structural changes in the ship

• Magnetic cargo

• Shipboard electronic equipment

Which magnetic corrector is located in an external tube and compensates for vertical soft iron effects?

• Flinders bar

• Heeling magnet

• Fore-and-aft B magnet

• Athwartship C magnet

What does the term "degaussing" refer to in maritime navigation?

• Neutralizing shipboard magnetic effects

• Adjusting the compass deviation

• Correcting gyro errors

• Aligning compass bearings with true headings

What should be done after completing compass adjustments on a vessel?

• Energize degaussing coils and repeat the swing.

• Record deviations at intercardinal points only.

• Ensure deviation is eliminated entirely.

• Remove all magnetic correctors.

Which coefficient in compass adjustment represents the vertical magnetic component?

• Parameter P

• Parameter Q

• Parameter R

• Parameter S

Which regulation specifies the installation requirements for magnetic compasses?

• SOLAS Chapter V Regulation 19

• IMO Resolution MSC.86(70)

• IMO Resolution A.382(X)

• STCW Table A-II/2

What does the process of "Compass Compensation" involve?

• Correcting deviations caused by degaussing currents

• Adjusting the fore-and-aft B magnets

• Eliminating residual deviation

• Swinging the ship for deviation analysis

What is the key limitation of a magnetic compass at the poles?

• Excessive residual deviation

• Insufficient true north alignment

• Sensitivity to magnetic interference

• Sluggish and unreliable performance

How are residual deviations after compass adjustment documented?

• On an isogonic chart

• In a deviation curve

• In the ship's logbook

• In a deviation record

What is the purpose of a pelorus or compass bearing device on a vessel?

• Correct for variation and deviation

• Take bearings over an arc of 360°

• Eliminate compass errors

• Adjust the gyrocompass heading