7.6.3 In this configuration, the paths are no longer than for a conventional system, and so the problems experienced by a reflector system (see 7.5.3) are avoided.7.6.4 The configuration of a transponder system can be made similar to that for symmetrical crossed paths; it can therefore provide automatic correction for skew flow.7.6.5 A disadvantage of the transponder configuration is in the complexity of the electronics of the transponder unit, especially if the system is multi-path or needs to be battery-powered.