Abstract: The invention relates to a carousel that is supported by a rotary plate controlled by a control mechanism (20). The mechanism (20) comprises: means for restraining said rotary plate (10) which are controlled in two states, a restrained state and a released state, said means being suitable for providing, in said restrained state, a rotational restraint of said rotary plate (10), and for allowing, in said released state, a free rotation of said rotary plate (10), and a device (36) for controlling said restraint means that is suitable for driving, on command, said restraint means into said released state, said restraint means being in the restrained state by default.

Abstract: The invention relates to a carousel that is supported by a rotary plate controlled by a control mechanism (20). The mechanism (20) comprises: means for restraining said rotary plate (10) which are controlled in two states, a restrained state and a released state, said means being suitable for providing, in said restrained state, a rotational restraint of said rotary plate (10), and for allowing, in said released state, a free rotation of said rotary plate (10), and a device (36) for controlling said restraint means that is suitable for driving, on command, said restraint means into said released state, said restraint means being in the restrained state by default.

Abstract: A system and method for changing a travel itinerary include receiving a request to make a change to a first travel itinerary that includes at least one segment, displaying an identification of one or more alternative segments, receiving a user selection of one of the alternative segments, modifying the first itinerary to include a reservation for the selected alternative segment, and releasing the segment of the first itinerary to be replaced by the selected alternative segments. The system and method may also include calculating a fare difference between the one or more alternative segments and the original segment to be replaced.