Acts 28:11 - Joseph Benson’s Commentary on the Old and New Testaments

And after three months The three winter months, which time Paul doubtless improved, as a true labourer in the Lord's vineyard. We departed in a ship of Alexandria, whose sign was Castor and Pollux Two fabulous semi-deities of the Greeks and Romans, who were said to be the sons of Jupiter and Leda, and, being translated to the heavens, formed the constellation called Gemini, or the Twins, a constellation which, when it appeared, was deemed propitious to mariners. And, as it was the custom of the ancients to have images of their gods, both on the head and stern of their ships, this Alexandrian ship had these, either on her prow or stern. And yet, in a ship having such an idolatrous image, Paul did not refuse to sail, considering it as being only the name of the ship.