(Gr. artemon), answering to the modern “mizzen-sail,” as some suppose. Others understand the “jib,” near the prow, or the “fore-sail,” as likely to be most useful in bringing a ship’s head to the wind in the circumstances described (Acts 27:40).
Easton’s Bible Dictionary
Main-sail
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.