Appendix 1 – Sample Calculation of the Coefficient f_w from the Standard f_w Curves

Sample: Bulk carrier

The subject ship is a bulk carrier shown in the following figure and the following table.

Figure 1 Subject ship

Table 1 Dimensions of the subject ship

Dimensions	Value
Length between perpendiculars	217	m
Breadth	32.26	m
Draft	14	m
Ship speed	14.5	knot
Output power at MCR	9,070	kW
Deadweight	73,000	ton

Calculation of f_w from the standard f_w curves

The paragraph numbers are followed by guidelines for calculating the coefficient f_w from the standard f_w curves.

1 The standard f_w value is calculated following paragraph 2.3. Since the subject ship is a bulk carrier, the standard f_w value is obtained from the following equation.

Standard f_w value = 0.0429 x ln(Capacity) + 0.294

2 Since the Capacity for the bulk carriers is deadweight, the Capacity for the subject ship is determined as 73,000 (ton). By substitution of 73,000 to the above equation, the standard f_w value is obtained as 0.774.

In the EEDI Technical File, f_w is listed as follows:

Appendix 1 – Sample Calculation of the Coefficient fw from the Standard fw Curves

Sample: Bulk carrier

Table 1 Dimensions of the subject ship

Calculation of fw from the standard fw curves

Appendix 1 – Sample Calculation of the Coefficient f_w from the Standard f_w Curves

Calculation of f_w from the standard f_w curves