Which restriction forced Viking longships during Trans-Atlantic travel routes to navigate by latitude using a nocturnal?

💡 Explanation

Unreliable magnetic compass readings near the poles challenged navigation because magnetic deviation increased uncertainty; therefore, sailors required celestial navigation techniques, using the nocturnal rather than depending on the compass, due to magnetic influences.

• Which hydrologic consequence occurs after widespread pre-Columbian deforestation?
• During ancient Mesopotamian canal construction, which risk increased due to poorly compacted canal walls?
• Which outcome resulted when pre-Columbian agriculturalists intensively cultivated maize using chinampas?
• Which risk increases when a medieval trebuchet bridge uses insufficiently lubricated capstan bearings?
• Which consequence results when sailing past a ship suffering from significant hogging?
• Which outcome followed the Byzantine's controlled sericulture, where unraveling silk fibers caused weakened threads?