What causes the packing bands to break on an inflating liferaft?

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Multiple Choice

What causes the packing bands to break on an inflating liferaft?

When the liferaft starts to inflate, it expands from a compact pack to a fully buoyant raft in a split second. The packing bands are the tight restraints that hold it compact inside the canister. As air rushes in and the raft unfolds, the fabric and chambers push outward with a lot of force, putting a sudden, high tensile load on those bands. If the bands are aged, damaged, or overstretched, they can snap under that rapid tension, letting the raft unfurl and surface. Water exposure, sunlight, or temperature changes are longer-term factors that can degrade materials, but the immediate break during activation comes from the strong expansion forces of inflation.

When the liferaft starts to inflate, it expands from a compact pack to a fully buoyant raft in a split second. The packing bands are the tight restraints that hold it compact inside the canister. As air rushes in and the raft unfolds, the fabric and chambers push outward with a lot of force, putting a sudden, high tensile load on those bands. If the bands are aged, damaged, or overstretched, they can snap under that rapid tension, letting the raft unfurl and surface. Water exposure, sunlight, or temperature changes are longer-term factors that can degrade materials, but the immediate break during activation comes from the strong expansion forces of inflation.

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