These airline-based kits use the LRL algorithm so much less definition of components is required. Reflects may be part of the kit but the only piece of information here is an offset length that is used to help with root selection (and is hence somewhat non-critical). The line lengths are the other parameters and they mainly serve for reference plane placement. All of these parameters must be entered manually since there are a large number of lines in the kit and usually only 2 or 3 will be used per calibration. Details on line selection and the trade-offs involved are discussed in the LRL/LRM section to follow.