Which navigational exploit became achievable when Vikings employed advanced square sail rigging?

💡 Explanation

Superior close-hauled sailing, using modified square sails, became possible because the improved sail trim allowed for higher angles relative to the wind through aerodynamic lift, therefore allowing further upwind progress, rather than just downwind sailing or rowing.

• Which consequence arose when increased sail area risked capsizing Viking longships?
• Which environmental consequence followed the shift to intensive maize cultivation in the pre-Columbian Valley of Tehuacan?
• Which outcome accelerated practical celestial navigation during early Islamic exploration?
• Which agricultural benefit resulted when Aztec chinampas used "sunken gardens" methodology in shallow lake Texcoco?
• Which maintenance risk existed historically for bronze-tipped plows?
• Which adjustment compensated for atmospheric refraction during celestial observations using an Islamic astrolabe?