The arrangement drawings

The arrangement drawings give an overview of the arrangement of the primary construction elements of the ship, showing the layout of the decks, frames, bulkheads and other structural parts in the hull. In MasterShip they are presented as paper-space drawings that are derived from the 3D assembly model built in the preceding process step, laid out on a paper-space tab and exported using the MasterShip templates.

                                                       Figure: arrangement drawing

Which SHIP-commands apply?

The following applies to this deliverable:

SHIPUPDATEARRANGEMENTDRAWINGS — you can update the arrangement drawing set if needed.

Besides this command, the drawing is prepared and exported using the MasterShip templates for the paper-space, which is not a SHIP-command in itself. The workflow applies as follows:

1.Right-click on one of the ‘lay-out’ tabs (paper-space) at the bottom-left of your AutoCAD session, select ‘From template...’, and choose the template from the Company-folder. It can then be used as a paper-space template.

2.Use MasterShip templates stored in the company-folder for the PDF-exporting.

3.Once imported, use MVIEW in this paper-space to make a view from the model-space.

4.Export & deliver the arrangement drawings to, for example, a client or subcontractor for review, or to the engineering team.

5.You could also export the drawings as DWG, or in another file format.

How can it be used?

1.Determine the overall ship layout and verify design requirements from the shipowner Arrange compartments, cabins, cargo areas and main equipment according to the shipowner’s technical specification. Check whether the functional requirements for cargo capacity, passenger accommodation, crew living space, machinery installation and operational access can be satisfied. Resolve conflicts between space demands at the concept stage.

2.Serve as the foundation for performance calculation Provide key inputs for hydrostatic calculation, stability calculation, trim & heel analysis, capacity calculation, tonnage calculation and weight estimation. The compartment layout and volume data from GA are essential for evaluating intact stability, damaged stability and tank capacities.

3.Support preliminary structural arrangement and definition of design boundaries Define positions of main bulkheads, decks and major openings. Coordinate with hull structural design to confirm the location of primary load-bearing members, and provide boundary conditions for hull form, shell expansion and structural layout drawings.

4.Carry out preliminary safety and regulatory compliance review Check compliance with international conventions and classification rules concerning fire zones, escape routes, emergency exits, life-saving appliances, access, ventilation and drainage arrangement. Identify non-compliance issues in the early design phase.

5.Act as the core drawing for basic design submission to classification society GA is one of the mandatory drawings for basic design approval. The shipowner and classification society review the overall layout, compartment partition, equipment arrangement and safety arrangement based on this drawing.

6.Support system conceptual design of each discipline Provide spatial reference for piping, electrical, HVAC, deck machinery and fire protection system designers. Each discipline develops their conceptual scheme according to the compartment and equipment layout shown on GA.

7.Used for preliminary cost estimation and quotation Determine vessel main parameters, compartment scale and equipment configuration to estimate steel weight, outfit quantity and equipment cost, forming the basis for project quotation and budget assessment.

The General Arrangement Plan (GA) is the core drawing of basic design. It comprehensively shows the overall layout of the vessel, including main dimensions, compartment division, arrangement of cargo holds, accommodation spaces, machinery spaces, deck layout, main equipment locations, escape routes, access openings and tonnage marks. It reflects the overall design concept of the ship and serves as the primary drawing for communication with the shipowner and classification society.