| A | B |
|---|
| after perpendicular (A.P.) | a vertical line taken after the end of a rudder post or at the center of rudder stock if there is no post |
| beam | the molded width of the ship at the widest point |
| camber | the curve of the deck transversely (the difference between the deck height at the center and at the side) |
| dead rise or rise line | the straight line slope of the bottom plating from the flat keel to the point of curvature |
| depth | height of the ship at the midship section from the base line to the molded line of the deck |
| draft (molded) | the height from the base line to the load water line |
| forward perpendicular (F.P.) | a vertical line at the point where the load water line crosses the foremost (front) part of the molded surface |
| freeboard | the height from the load water line to the underside of the upper deck, amidship |
| load water line (L.W.L) | the water line at which the ship will float when it is loaded to its designed draft |
| midship section | a transverse section exactly halfway between the F.P. and the A.P., usually the widest part of the ship |
| molded lines | the inside surface of the skin or plating of a ship. they are the working line of ship construction, where parts should be filled. |
| parallel middle body | the straight part at the center of a ship where water lines and buttock lines have no curves, where fore and aft lines are parallel |
| profile | side view of a ship. The plan shows buttock lines as curved where they connect the molded surface. it also shows the sheer of the deck |
| sheer | the curve of the deck longintudinally as shown in the profile (difference between the height at midship and the ends) |
