Which of the following is necessary to prevent X-straps from slipping off during securement?

The necessity of a tarp or strap in preventing X-straps from slipping off during securement is rooted in the way these elements work together to enhance the stability and integrity of the load. A tarp can help keep the load contained and minimize movement caused by wind or vibrations. It provides a smooth surface that can assist in maintaining traction between the load and the X-straps. Likewise, additional straps can create more friction and anchoring points, effectively reducing the chance of slippage.

While secondary anchors, regular inspections, and ensuring a weighted load may contribute to overall securement practices, they do not directly address the specific function of preventing the X-straps from slipping off in the same way that a tarp or strap does. For example, secondary anchors can provide extra support, but without the foundational securement of the tarp or strap, the primary issue of slippage could still occur, especially under certain conditions.