Aircraft having a cabin area having multiple seat units, the seat units comprising the following elements: an aircraft seat having a seat frame; a first, front fastening unit and a second movable fastening unit that are arranged one behind each other, characterized in that the two fastening units are configured such that the seat spacings and the seating arrangement can be changed by the crew; wherein each of the two fastening units comprises: a connecting element; wherein the connecting element comprises a first bearing by which said connecting element is mounted to the seat frame in a movably supported manner; wherein the connecting element comprises a second bearing by which said connecting element is mounted to a fixing arrangement in the floor in a movably supported manner; wherein the two bearing cooperate with one another such that it is possible for the seat frame to move relative to the fixing arrangement in the floor; wherein the relative movement of the seat frame to the fixing arrangement in the floor occurs from a first seat position to a second seat position; wherein the two seat positions are stable seat positions and the seat frame can only be moved out of said stable positions by applying an external force; wherein the connecting elements are each pivotable about a bearing; wherein a fastening unit comprises a mechanism for locking in a region of one of the bearing; wherein the mechanism comprises an open state and a locked state; wherein the open state renders possible for the connecting element to move about the respective bearing; and wherein the locked state prevents the connecting element from moving about the respective bearing, characterized in that: the front fastening unit comprises the mechanism for locking in region of one of the bearing; the mechanism for locking comprises a bore hole in conjunction with a locking bolt; wherein the seat frame comprises in conjunction with the connecting element the mechanism for locking. an aircraft seat having a seat frame; a first, front fastening unit and a second movable fastening unit that are arranged one behind each other, characterized in that the two fastening units are configured such that the seat spacings and the seating arrangement can be changed by the crew; a connecting element; wherein the connecting element comprises a first bearing by which said connecting element is mounted to the seat frame in a movably supported manner; wherein the connecting element comprises a second bearing by which said connecting element is mounted to a fixing arrangement in the floor in a movably supported manner; wherein the two bearing cooperate with one another such that it is possible for the seat frame to move relative to the fixing arrangement in the floor; wherein the relative movement of the seat frame to the fixing arrangement in the floor occurs from a first seat position to a second seat position; wherein the two seat positions are stable seat positions and the seat frame can only be moved out of said stable positions by applying an external force; wherein the connecting elements are each pivotable about a bearing; wherein a fastening unit comprises a mechanism for locking in a region of one of the bearing; wherein the mechanism comprises an open state and a locked state; wherein the open state renders possible for the connecting element to move about the respective bearing; and wherein the locked state prevents the connecting element from moving about the respective bearing, characterized in that: the front fastening unit comprises the mechanism for locking in region of one of the bearing; the mechanism for locking comprises a bore hole in conjunction with a locking bolt; wherein the seat frame comprises in conjunction with the connecting element the mechanism for locking. the front fastening unit comprises the mechanism for locking in region of one of the bearing; the mechanism for locking comprises a bore hole in conjunction with a locking bolt; wherein the seat frame comprises in conjunction with the connecting element the mechanism for locking.