A.loss of maneuverability
B.lines to part
C.damage to the towing vessel and tow
D.a saving in the transit time

A.small plate which fills the aperture between riveted strakes and the vessel framing
B.backing plate which is used to level the strakes while riveting，and then removed
C.internal frame to which the side shell is riveted
D.seam that is welded after riveting is completed