At the ocean or sea, typically of a ship or person aboard a ship.(phrase)
In a state of confusion or bewilderment.(phrase)
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Use "at sea" in a sentence
"Varner gave testimony he had been employed by certain Confederate sympathizers to supply the Rebellion with “goods and chattel” and that his entire cargo and crew had been overcome at sea by “creatures not of this Earth but from the very Bowels of Hell.”"
"When his near-vertical climb reached 90,000 feet, atmospheric pressure fell to a scant 6 millibars, about 1 percent of the pressure at sea level."
"He was encouraged in the undertaking by St. Oswald of York, who advised him that where men have renounced the world the air becomes salubrious, the fruits of the earth are gathered in abundance, famines and pestilence disappear, the State is duly governed, prisons are opened, and captives set free, those wrecked at sea are relieved, the sick are healed and the weak find means for their convalescence."