Approximately $1\mathrm{.}25$ million tonnes of ore per year has to be transported between two ports and the distance between the ports is $3000$ miles. Compare the economic differences between a bulk carrier loading$/$unloading with its own facilities and another bulk carrier using the facilities of the port. Port facilities limit the length of the ship to $225$m and the draft to $13$m$.$ The shipowner expects a return of $20\%$ on his ship which he intends to operate for $20$ years.

Ship Displacement $72100$ tonnes

Empty Hull Mass $($without crane$)$: $13000$ tonnes

Other DWT components: $325$ tonnes

Average Ship Speed: $12\mathrm{.}5$ knots

Fuel Consumption: $54$t heavy fuel $+4$t diesel per day

Carry$-$on fuel margin $25$

Loading at the port: $2$ days

Unloading at the harbour $2$ times $8-$hour shifts $+1$ day manoeuvring

Port Cost $$10000/$RT RT:Round Trip

Ship Price $$12$ million

Annual Personnel Expenses $$250000$

Annual Vessel Expenses $$300000$

Heavy Fuel Price $$300/$tonne

Diesel Price $$600/$tonne

Annual Days Expended in Expedition $350$

Differences in Ships

Harbour Unloading Units: $1100$ tonnes$/$hour and $$0\mathrm{.}5$ per tonne

Ship Crane $2000$ tonnes

Ship Crane Unloading $2000$ tonnes$/$hour

Ship Crane $$3750000$

Crane Ship Extra Cost $$80000($Maintenance$)+$ $$20000($Personnel$)$

Crane Fuel consumption $20$ tonnes$/$day $($diesel$)$

Crane Maintenance $3$ days per year