Step 1: Understanding the Concept:
Before a fabricated fishing net webbing can be deployed in the water, it must be assembled with structural lines and buoyancy/sinker components.
Step 2: Detailed Explanation:
The entire process of assembling and mounting a net webbing onto its supporting ropes (head rope, foot rope, breast lines), along with the attachment of floats, sinkers, bridles, and other operational hardware, is defined as rigging.
Without proper rigging, a net cannot maintain its designed shape, open area, or spatial orientation under water.
Step 3: Final Answer:
The process is termed rigging, which corresponds to option (D).