Acts 27:29 (KJV)

But when the fourteenth night was come, as we were driven up and down in Adria, about midnight the shipmen deemed that they drew near to some country;

And sounded, and found it twenty fathoms: and when they had gone a little further, they sounded again, and found it fifteen fathoms.

Then fearing lest we should have fallen upon rocks, they cast four anchors out of the stern, and wished for the day.

And as the shipmen were about to flee out of the ship, when they had let down the boat into the sea, under colour as though they would have cast anchors out of the foreship,

Paul said to the centurion and to the soldiers, Except these abide in the ship, ye cannot be saved.