open ocean

:  having no enclosing or confining barrier :  accessible on all or nearly all sides

:  being in a position or adjustment to permit passage :  not shut or locked

:  having a barrier (such as a door) so adjusted as to allow passage

:  to move (something, such as a door) from a closed position

:  to make available for entry or passage by turning back (something, such as a barrier) or removing (something, such as a cover or an obstruction)

:  to make available for or active in a regular function

:  opening

:  open and unobstructed space: such as

:  open air

:  the whole body of salt water that covers nearly three fourths of the surface of the earth

:  any of the large bodies of water (such as the Atlantic Ocean) into which the great ocean is divided

:  a very large or unlimited space or quantity