Planners researching carrier speed potential and cost efficiency decided that the fastest vessel was not necessarily the most profitable. Therefore ships were designed to travel at slightly slower speeds. The profits from fuel conservation have been substantial.
又如當先進海運國家的船公司，紛紛發展速度高但較耗燃料的船型時，長榮卻穩紮穩打地把船速訂在最符合服務與經濟效益的標準上。