Which consequence arose when historical celestial navigation encountered iron ship hulls?

💡 Explanation

Stray magnetism interfered with navigation because deviation errors arising from the ship's magnetic field influenced compass readings; therefore sextant observations became essential, rather than relying on compasses, in iron hulled ships.

• During celestial navigation, which outcome affects the accuracy of positional fixes due to slow clock mechanisms?
• Which effect limited long section road construction in pre-Roman Europe before 300 BC?
• In 18th-century drydock ship construction, which risk increases most when timber seasoning falls below optimum levels before planking?
• During a Roman siege, which outcome results from concentrated heat application exceeding stone's spalling threshold?
• Which risk increases when tin content falls below optimal range in early bronze metallurgy casting?
• Which outcome arises from incomplete seasoning during 18th-century ship buliding?