According to the Inquiry, 1785 tons of coal were consumed between Adelaide and Durban. 80 tons per day (1520, total) equated with what one would expect from a steamer Waratah's size. But in reality, she consumed 94 tons per day, which if you recall, almost matches the figure raised at the Inquiry: 'why were an additional 15 tons consumed per day'? I have no doubt that the answer lies in 'pressing' Waratah's under powered engines and excessive dead weight.
Three hundred persons would also use a considerable
deal of provisions. The consumption of
water would also be a factor, so
it may be taken for granted, even if
she discharged no cargo at Durban that,
on leaving that port, the vessel would
be higher in the water than when leaving Australia.
This was not true due to the fact that Waratah had a desalination plant = constant production of water. Waratah departed Durban with the same overall draught of 28.9 ft. as when she departed Australia.