Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Naval Victory at Mylae
The outset, nevertheless, was not favourable to the Romans. The Roman admiral, the consul Gnaeus Cornelius Scipio, who had sailed for Messana with the first seventeen vessels ready for sea (494), fancied, when on the voyage, that he should be able to capture Lipara by a coup de main. But a division of the Carthaginian fleet stationed at Panormus blockaded the harbour of the island where the Roman vessels rode at anchor, and captured the whole squadron along with the consul without a struggle.
This, however, did not deter the main fleet from likewise sailing, as soon as its preparations were completed, for Messana. On its voyage along the Italian coast it fell in with a Carthaginian reconnoitring squadron of less strength, on which it had the good fortune to inflict a loss more than counterbalancing the first loss of the Romans; and thus successful and victorious it entered the port of Messana, where the second consul Gaius Duilius took the command in room of his captured colleague.
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Reference address : https://www.ellopos.net/elpenor/rome/3-02-war-rome-carthage-sicily.asp?pg=24