The purpose of the soft iron spheres mounted...

Question 1 / 2707066636ee928f7522a1c519f42

Question 1 of 2707066636ee928f7522a1c519f42

The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.

Question 1 of 27070

The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.

🔍 Key Concepts

• Magnetic compass compensation components: soft iron spheres, fore-and-aft/stathmos magnets, heeling magnet • Difference between permanent magnetism of the ship and induced magnetism in soft iron • Which type of error varies with the ship’s heading on different compass points

💭 Think About

• Think about what material the spheres are made of and how soft iron behaves in the Earth’s magnetic field: is it permanently magnetized or induced? • Ask yourself which kind of deviation changes as the ship turns onto different headings, and which binnacle devices are used to correct each type. • Match each answer choice to the specific compass-correction device you know: which one uses vertical magnets, which uses fore‑and‑aft magnets, and which uses soft iron shapes?

✅ Before You Answer

• Identify which compass error is due to induced magnetism in soft iron versus permanent magnetism in steel structure. • Recall which device corrects vertical forces (heeling magnet) and which corrects fore‑and‑aft / athwartship permanent magnetism (adjusting magnets in the binnacle). • Verify from your notes which item is specifically described as soft iron spheres on horizontal arms beside the compass bowl and what they correct.

Question 1 of 27070

The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.

the residual deviation

the vertical component of the permanent magnetism of the vessel

magnetic fields caused by electrical currents in the vicinity

induced magnetism in the horizontal soft iron

Question 1 / 2707066636ee928f7522a1c519f42

Question 1 of 2707066636ee928f7522a1c519f42

The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.

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Question 1 of 27070

The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.