Which primary risk increased during Viking longship voyages when internal ballast shifted unevenly during rough seas?

💡 Explanation

Increased hull shear stress becomes a major risk, because uneven weight distribution amplifies cyclical BENDING MOMENTS on the hull. Therefore structural failure probability increases, rather than aerodynamic sail luffing, steering failure, or propeller inefficiency which would require different mechanisms.

• With a sextant on heavy seas, which outcome occurs due to inconsistent angular measurement?
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