The Mary Celeste (or Marie Céleste as it is fictionally referred to by Sir Arthur Conan Doyle and others after him) was an American brigantine

Brigantine

In sailing, a brigantine or hermaphrodite brig is a vessel with two masts, only the forward of which is square rigged.-Origins of the term:...

 merchant ship famous for having been discovered on 4 December 1872, in the Atlantic Ocean

Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

 unmanned and apparently abandoned (one lifeboat was missing), despite the fact that the weather was fine and her crew had been experienced and able seamen.