Depth: The depth of the ship varies along the length. But the depth of the ship is taken as the distance between the undersides of the deck amid ship to the bottom of the keel. You might not get an exact value of depth as the hull is symmetrical and the depth varies thorough out the ship. For example, the depth is greater at stern than at midship.
Width or beam or extreme breadth: The width of the ship is also known as the extreme breadth. It is generally measured at the amid ship. It is the greatest distance between the two sides of the ship at the greatest width.
Sheer: It is measured as the rise of the deck towards the stem or stern. It is the height of the deck at the side above the deck at sides amidships.
Camber or round of beam: It can be defined as the side of the deck going from side to the centre of the ship.
Rise of floor or dead rise: At the amidships region, the bottom of the ship is extended out to intersect the moulded breadth line. The rise or the height of this intersection above the keel is known as rise of floor or dead rise.
Tumble home: If the sides of the ship at the amidships is not vertical and if the upper deck beam is less than the waterline, it is said to have tumble home.
Draught: It is the distance between the keel and the waterline at any point along the length of the ship. Moulded draught is measured from the inside of the keel plating.
Trim: The difference between the draughts at forward and aft is known as the trim. Trim is mentioned as by the bow or by the stern depending upon which one is greater.
Freeboard: It is essential in determining the stability of the ship. It is the difference between the depth at side and the draught, i.e. it is the height of the deck above the waterline. Freeboard is generally less at amidships than at bow and stern.