Comments on “Coordinated Path-Following Control for a Group of Underactuated Surface Vessels”

Some flaws in a paper written by Jawhar Ghommam and Faïçal Mnif ( IEEE Transactions on Industrial Electronics, vol. 56, no. 10, pp. 3951–3963, Oct. 2009) concerning the coordinated path-following control problem for a group of underactuated surface vessels are indicated and corrected.