Which instability increases when a Viking longship's length increases?

💡 Explanation

Longer ships have a reduced freeboard relative to beam, therefore their metacentric height decreases, increasing roll instability specifically capsizing, rather than rudder/sail issues or ice damage relevant regardless keel length.

• Which outcome occurs at coastal Roman fortress walls during prolonged naval sieges that prevents resupply?
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• During Byzantine naval sieges, which strategic consequence arose when Greek Fire's launching mechanisms exceeded temperature limits?
• Which limitation increased for Viking longships entering shallow rivers?
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• Which limitation became apparent when early astrolabes projected celestial locations?