Bava Batra 76B

עד שימשכנה או עד שישכור את מקומה!

until he pulls it, or until he rents its place. How, then, can the opinion of the first tanna of the baraita be ascribed to R' Yehuda HaNasi?

לא קשיא; כאן ברשות הרבים, כאן בסימטא.

The Talmud answers: This is not difficult; here, where R' Yehuda HaNasi states that a ship is acquired through passing, he is referring to a ship situated in the public domain. Since a ship in the public domain cannot be acquired through pulling, which must be performed in a domain that is in one’s possession, it is acquired through passing. By contrast, there, in the first baraita, the ship is situated in an alleyway [simta], which is not the public domain, as both parties have the right to keep their possessions there. A ship in this location must be acquired through pulling.

במאי אוקימתא להא בתרייתא ⁠– ברשות הרבים? אימא סיפא ⁠– וחכמים אומרים: לא קנה עד שימשכנה. ואי ברשות הרבים, ממאן אגר? ותו, משיכה ברשות הרבים מי קניא?! והא אביי ורבא דאמרי תרוייהו: מסירה קונה ברשות הרבים, ובחצר שאינה של שניהם; משיכה קונה בסימטא, ובחצר שהיא של שניהם; והגבהה קונה בכל מקום!

The Talmud asks: To what case did you interpret that last baraita to be referring? It was interpreted as referring to the public domain. If so, say the latter clause of the baraita: And the Rabbis say that the buyer does not acquire it until he pulls it or until he rents its place. The Talmud asks: But if the ship is situated in the public domain, from whom can he rent the place? And furthermore, does pulling in the public domain effect acquisition? But don’t Abaye and Rava both say with regard to the different methods of acquisition: Passing effects acquisition in the public domain or in a courtyard that does not belong to either of the parties; pulling effects acquisition in an alleyway or in a courtyard that belongs to both of the parties; and lifting effects acquisition in every place, even in the seller’s domain.