Which risk increased during transoceanic voyages in 18th-century wooden ships due to improperly sealed hull planks?

💡 Explanation

When hulls weren't properly sealed, marine borers could infest the wood because the planks become more vulnerable, resulting in structural degradation. Therefore, timber ships risked infestations, rather than spontaneous combustion, navigation errors, or sail warping, which relate to completely distinct mechanisms.

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