Which critical risk increased when 18th-century ships began using iron ballast near navigation equipment?

💡 Explanation

When iron ballast was placed near navigation equipment, induced magnetism from ship's structure created magnetic fields that deflected the compass needle via magnetic interference causing inaccurate readings. Therefore, compass deviation increased, rather than rudder jamming, hull weakening, or sail damage which are associated with corrosion, galvanic action or wind respectively.

• Which outcome occurs when heavy rainfall saturates poorly compacted fill within a pre-Columbian agricultural terrace system?
• Which navigational error arises when sea horizon appears distorted due to thermal inversion during sextant measurement circa 1780?
• Which outcome arises when timber ships, during the 18th century, exceeded longitudinal strength limits during construction?
• Which outcome resulted when the Tay Bridge design omitted sufficient cross bracing against lateral forces?
• Which problem limited the agricultural output of inclined terraces in the pre-Columbian Andes?
• Which problem arose when adapting timber ship construction to ironclad warships during the 19th century?