...
A ship design always contains a layout with at least a hull and defined reference planes. The entities Decks and Bulkheads will be optional for a user to include in their ship design.
Entity Hull 
- Include the following two entities as children of
Hull:
| Singular obligatory |
| Singular obligatory |
Entity Reference planes 
- Include the following two entities as children of
Reference planes:
| Singular obligatory |
| Singular obligatory |
Entity Decks 
Entity Decks will be developed as a container which contains combined data of all defined singular decks below.
...
The entity Decks can contain one or more Deck entities, each with the same content (which will be added shortly), however, the user can provide different input values for each Deck.
Entity Bulkheads 
This ship configurator uses another entity structure for defining (transverse) bulkheads than for defining decks. The same entity structure could be used, but it is more instructive to present (and develop) a different approach.
...