Mechanical gearing of deck machinery such as the windlass or towing engine should ______________.

A
be open to view so, if a foreign object gets in the gearing, the operator can immediately stop the machinery
B
have a guard over the gearing
C
be painted a contrasting color from the base color in order to call attention to the gearing
D
not be operated if there is any crew within 10 feet of the machinery
E