A memory device includes at least one magnetic random access memory cell, which includes: a magnetic tunnel junction having a first end and a second end; and a strap electrically coupled to the second end of the magnetic tunnel junction. The disclosed system and method utilize a vortex created by recirculation of the fluid medium to achieve aeration and mixing without substantial foaming. The surface element which is associated with the folding device is designed in such a manner that it takes its closed position automatically. A motor and gear assembly are provided for moving the second end of the elongate body relative to the hull of the sailing boat.