NAV 1 Week 8 Quiz Magnetic Compass

Why is the magnetic compass placed near the centerline of the ship?

• To minimize vibration from deck activity

• To ensure visibility from the helm

• To reduce solar glare

• To align with gyrocompass data

The heart of the magnetic compass is the:

• Compass card

• Pivot

• Magnetic needle

• Lubber line

The damping effect in liquid-filled compasses mainly reduces:

• Magnetic deviation

• Gyro drift

• Solar heating of the compass card

• Oscillations from ship's motion

Why is the lubber line aligned with the ship's fore-and-aft axis?

• To reduce deviation

• To indicate ship's heading

• To measure compass error

• To stabilize the gimbals

A compass binnacle primarily functions to:

• House and protect the compass

• Store deviation cards

• Compare gyro and magnetic data

• Reduce alcohol evaporation

Which property of compass fluid prevents freezing in polar waters?

• Low density

• Low freezing point

• Optical clarity

• Damping viscosity

Which of the following is a limitation of the magnetic compass?

• Affected by ship's magnetism

• Requires fluctuating power supply

• Always points to true north

• Cannot function at sea

Which IMO resolution sets performance standards for magnetic compasses?

• MSC.148(77)

• MSC.81(70)

• MSC.86(70)

• MSC/Circ.1091

What is the primary safety rationale for SOLAS compass arrangement provisions?

• Reduce shipbuilding cost

• Ensure reliable independent heading reference

• Increase speed of navigation

• Provide extra training to crew

A pelorus is used for:

• Taking bearings of objects

• Correcting magnetic deviation

• Replacing the lubber line

• Storing deviation data