An air-powered device that can shoot a sling, harness, rescue rope, or messenger line great distances is known as a

• A. Line Gun
• B. Air Cannon
• C. Rope Launcher
• D. Messenger Device

Answer: (A)

In rescue work, getting a line across a span quickly and reliably is essential, and the tool designed for that job is a line gun. It uses compressed air to propel a messenger line, sling, harness, or rescue rope to a distant point so you can establish a haul line, anchor, or retrieval system without hand-throwing. This device is purpose-built for delivering line over obstacles or long distances, which is why it’s the best term for what’s described. Other labels like air cannon, rope launcher, or messenger device are more general or outdated descriptions and don’t capture the specific, field-standard name used for this tool.