General

A drawing can contain model views and 2D geometry like lines and arcs, texts and symbols. The geometry of the model views is stored in the drawing together with a link to the original model objects, so that model information can be obtained from views on a drawing. The drawing can also be updated when a model change has been done.

Marine Drafting is used both as a drafting system and as a modelling interface for the hull modelling functions. This can result in a session where model objects are to be saved but not the current drawing. To handle this situation, the function Save Work is used to save model objects, while the functions Save Drawing and Save Drawing As are used to save the current drawing.

When saving a drawing, two storing operations are made. One is to the PADD database and one to an individual file (.SDB file).