The capacity calculation is repeate

The capacity calculation is repeated for four ship sizes (1,200 TEU, 2,600 TEU, 4,000 TEU, 6,500 TEU).With a round-voyage distance of 8,500 miles a single ship can make one round voyage every 28 days if it averages 19 knots. To run a weekly service, four ships are needed. However, there are plenty of choices open to service operators if they vary the speed or the number of port calls. If only one port call is made at each end of the journey, the round trip could be reduced to 21 days, and the route can be serviced with only three ships, which would be cheaper. Alternatively, it might be argued by the marketing department that to service the trade properly ten port calls are needed rather than seven. Since each port call takes an average of 1.35 days, this