Which description best fits a hose jacket?

A hose jacket is designed to provide a protective and reinforcing layer around a damaged section of a fire hose. The ideal choice accurately describes a split metal cylinder, which serves to clamp around the hose. This type of construction allows the jacket to provide support and help prevent further damage or failure, ensuring a secure and reliable connection while firefighting activities continue.

In the context of hose operation, a hose jacket made from a split metal cylinder is effective because it can endure the high-pressure conditions typically experienced by hoses during use. The jacket effectively compresses the damaged area to limit leaks and maintain pressure. Other options do not convey the necessary durability or structural support required for the function of a hose jacket. For instance, a soft rubber sheet would lack the strength needed to reinforce a hose, a stiff canvas patch might not adequately cover or protect during high-pressure use, and a wound plastic coil would likely not be rigid enough to stabilize a damaged hose section.