Define bartack and its purpose in parachute sewing.

• A. A decorative cross-stitch for aesthetic.
• B. A dense series of stitches at a load point used to reinforce and prevent seam slippage or opening.
• C. A knot at the end of a seam.
• D. A brand of sewing machine.

Answer: (B)

A bartack is a dense series of stitches placed at a load point to reinforce the fabric and thread and prevent slipping or opening of the seam under load. In parachute sewing, these high-stress points—where lines, risers, or canopy seams experience sharp tension—need a secure anchor. The stacked stitches create a compact, load-bearing anchor that distributes stress over a small area, resists thread creep, and stops the seam from opening or fraying as forces increase. It’s not decorative, not a knot, and not a sewing machine brand; it’s a purposeful reinforcement used to keep critical joints and attachments secure under load.