A.or B.and C.nor D.either
A.for my vessel crossing safely B.my vessel is to cross safely C.for my vessel to cross safely D.for my vessel's crossing safely
A.the volume of all intact spaces above the waterline B.an intact space below the surface of a flooded area C.an intact space which can be flooded without causing a ship to sink D.the space at which all the vertical upward forces of buoyancy are considered to be concentrated