Define the current boat before planning the change.

As-is configuration

Collect the available drawings, equipment data, maintenance records, photographs, and prior change information. Inspect the affected area, capture the geometry that controls the work, and mark missing or conflicting information before defining the change.

Scan data and reverse engineering

Before capture, define the area, datum, required accuracy, exclusions, who controls the data, where it may be used, and the dimensions that must be checked physically. Use point cloud or surface data only after its coverage, registration, and accuracy are understood. Derive only the geometry and drawings needed for fit, routing, alignment, replacement, or repeatability.

• Equipment rooms, decks, machinery spaces, and installation envelopes
• Missing or obsolete parts and mounting geometry
• Replacement interfaces and as-built updates

Change impact

Compare the current and proposed configurations. Identify changes to foundations, attachments, access, and service clearances. Then trace the effects on electrical load, controls, cooling, fuel, exhaust, communications, operator use, installation sequence, and testing.

Structural and material changes

Define the function, geometry, interfaces, materials, and attachments for supplier-built aluminum or composite parts. Record corrosion controls, fabrication constraints, and inspection needs. Where required, use load, laminate, structural, and review inputs accepted by the responsible qualified party.

Installation and closeout

Prepare the drawings, interface data, supplier actions, installation checks, commissioning steps, and test requirements needed by the yard and installers. Record field discrepancies and accepted changes as they occur so the as-built package reflects the work performed.