Acts 27:17

17After hoisting it up, they used supports to undergird the ship. Then, fearing that they would arun aground on the Syrtis, they lowered the gear,
That is,  the sea-anchor (or possibly the mainsail)
and thus they were driven along.

Acts 27:41

41But striking a reef,
Or sandbank, or crosscurrent; Greek place between two seas
dthey ran the vessel aground. The bow stuck and remained immovable, and the stern was being broken up by the surf.
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