Page 77 - statbility for masters and mates

Form coef®cients 65
or
Note
or
Fig. 9.4
Volume of ship L Am Cp
Cm Cp Am Volume of ship B d L Am
Volume of ship L B d
Cb ; Cm Cp Cb
Cp CB Cm
Note. Cp is always slightly higher than CB at each waterline.
Having described exactly what Cw, Cb, Cw and Cp are, it would be useful
to know what their values would be for several ship types.
First of all it must be remembered that all of these form coef®cients will
never be more than unity.
For the Cb values at fully loaded drafts the following table gives good
typical values:
Ship type Typical Cb fully loaded
ULCC 0.850 Supertanker 0.825 Oil tanker 0.800 Bulk carrier 0.750
Ship type
General cargo ship Passenger liner Container ship Coastal tug
Typical Cb fully loaded
0.700 0.625 0.575 0.500
medium form ships (Cb approx. 0.700), full-form ships (Cb > 0:700), ®ne-form ships (Cb < 0:700).