The NLP and LP models have been computationally implemented employing the LINGO modelling language and optimiser20. The results so obtained may be summarised as follows. On the one hand, the global optimal solution of the NLP model yields a ship speed value of 30.76 knots, a voyage duration of 65 hours, and a voyage fuel consumption of 135.681 gallons. On the other hand, the LP model yields a ship speed fuel mix of 20 knots for 37 hours and 45 knots for 28 hours, thus giving voyage duration time of 65 hours; furthermore, the LP model yields a voyage fuel consumption of 123.605 gallons.