Various factors will lead the organist to “open up” the legato touch slightly, resulting in tiny breaks between some or all of the notes. For example: a reverberant acoustical setting may require a more articulate approach to achieve clarity, and early music often calls for a more articulate basic touch.
If the breaks are small enough, the line can be heard as an “articulate legato.” A skilled organist can vary the size of the tiny spaces between the notes of an articulate legato line, producing subtle agogic accents at strategic points.
As the breaks grow larger and become more apparent, the touch might be labeled more precisely either non-legato or staccato.