Sargon II (reigned 722–705 BCE) ruled the Neo-Assyrian Empire at its zenith, but he did not cross any sea. His domain was landlocked, centered in Mesopotamia (modern Iraq), extending to the Levant, Anatolia, and the Zagros Mountains.
Assyrians used rivers (Tigris, Euphrates) for transport. They employed Phoenician ships for coastal logistics but had no blue-water navy. Sargon's famous "sea" reference in inscriptions likely means the Mediterranean coast, not crossing it.
His successor, Sennacherib, later built a fleet on the Persian Gulf—but Sargon never sailed.