Specifies whether Replication Option returns control to RDO
    immediately after the transfer starts or waits until the transfer
    completes. You must use the NOW argument if you specify WAIT
    or NOWAIT. The default, NOWAIT, causes Replication Option to
    return control immediately to the RDO command mode while the
    transfer executes. With NOWAIT in effect, you can enter other
    RDO statements while the copy process completes the transfer of
    database records to the target database.

    The WAIT option ensures that the transfer completes before
    control is returned to RDO.