A.the propeller diameter
B.the propeller radius
C.the pitch angle
D.the length of helix
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A.a helix
B.a helicoidal
C.a curve
D.a cone
A.a line
B.a circle
C.a helix
D.an epllicate
A.dependent
B.in dependent
C.in series
D.in parallel
A.one-third
B.two-thirds
C.one-fourth
D.two-fourths
A.Classification Society Rules
B.National requirements
C.The IMO International Convention for the Safety of Life at Sea
D.All of the above
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