Deck Safety (Supplementary) USCG Question #73 (Set 1)

A deep keel on a sailing vessel increases the __________.

Official USCG Answer & Rule Citation

Correct Answer: Option B — resistance to lateral movement

A deep keel increases the underwater lateral plane of a sailing vessel. This configuration generates hydrodynamic lift against leeward drift, significantly improving resistance to lateral movement when sailing on various headings.

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