Class 2 (2nd Engineer) SC&S 📅 Sep 2023

Exam Question

(a) What is meant by the Admiralty Coefficient and the Fuel Coefficient? (6)

(b) A ship of 14900 tonne displacement has a shaft power of 4460 kW at 14.55 knots. The shaft power is reduced to 4120 kW and the fuel consumption at the same displacement is 541 kg/h. Calculate the fuel coefficient for the ship. (10)

Reference Answer

The Admiralty Coefficient (C) is a method for estimating the propulsion power needed for a newly built ship. It's considered relatively constant for a given ship design. The formula is:
$$C=\frac{\Delta^{2/3}\times V^3}{BP}$$
Where:
C = Admiralty Coefficient

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