Navy Parachute Rigger (PR) Introduction and Sewing Practice Test

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How should you finish a cut edge on parachute fabric to prevent fraying?

Leave raw edge.

Melt the edge with heat.

Apply glue to the edge.

Use an edge-finishing stitch (overcast/overedge) or equivalent Navy-approved method.

Finishing the edge with an edge-finishing stitch locks the fibers and prevents unraveling. On parachute fabric, the cut edge is vulnerable to fraying as the material flexes, bends, and bears load during packing, deployment, and use. An edge-finishing stitch, such as an overcast/overedge stitch (or an equivalent Navy-approved method), sews close to the edge and wraps or encases the edge so the threads bind the edge fibers together. This creates a durable, uniform finish that resists fray, holds up under stress, and maintains the fabric’s strength and flexibility.

Leaving a raw edge invites fibers to pull out and shortens the life of the fabric. Melting the edge with heat can damage the fibers and alter the fabric’s strength and behavior. Gluing the edge can add stiffness, moisture sensitivity, and inconsistent bonding, which may fail under field conditions. Navy-approved edge finishing ensures the method is proven and compatible with parachute fabric and inspection standards, providing reliable performance.