Albert Barnes on Acts 27:21

But after long abstinence. By the violence of the storm, by their long-continued labour, and by their apprehension of danger, they had a long time abstained from food.

And to have gained this harm. To have procured this harm, or have subjected yourselves to it. Had you remained there, you would have been safe. It seems to be bad English to speak of gaining a loss, but it is a correct translation of the original, κερδησαι, which expresses the idea of acquiring or procuring, whether good or evil. See Acts 27:9,10.

(a) "hearkened" Acts 27:10 (b) "have loosed" Acts 27:13 (*) "gained" "procured"