In order to make a comparative assessment of the NLP and LP models, a re case study is considered, which is based on a voyage of the SEAFIGHTER patrol boat of the US Navy, and which is described in Brown et al10. As stated in Brown et al.10, SEAFIGHTER employs “mixed-propulsion modes, one for slow motion keeping, and one for high-speed transits”, whereby diesel engines and gas turbines are used in slow motion mode (in ship speed range 5 - 20 knots) and fast motion mode (in ship speed range 20 -55 knots), respectively; see Fig.9 in Brown et al10.