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
Maritime Relations - Piracy
It remains that we glance at the maritime relations of this period; although there is hardly anything else to be said, than that there no longer existed anywhere a naval power. Carthage was annihilated; the war-fleet of Syria was destroyed in accordance with the treaty; the war-marine of Egypt, once so powerful, was under its present indolent rulers in deep decay. The minor states, and particularly the mercantile cities, had doubtless some armed transports; but these were not even adequate for the task--so difficult in the Mediterranean--of repressing piracy.
This task necessarily devolved on Rome as the leading power in the Mediterranean. While a century previously the Romans had come forward in this matter with especial and salutary decision, and had in particular introduced their supremacy in the east by a maritime police energetically handled for the general good,(40) the complete nullity of this police at the very beginning of this period as distinctly betokens the fearfully rapid decline of the aristocratic government.
40. Cf. III. III. Illyrian Piracy
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Reference address : https://www.ellopos.net/elpenor/rome/4-01-gracchi.asp?pg=112