What is the term used for a master stream device that is often called a deck gun?

The term for a master stream device commonly referred to as a deck gun is accurately identified as a turret pipe device. This device is typically mounted on the deck of a fire apparatus and is designed to deliver a large volume of water to the fire from a fixed position. The turret pipe allows for adjustable angles and can be operated by the driver/operator from within the vehicle or remotely, providing versatility and efficiency in firefighting operations.

While other choices mention equipment related to firefighting, they do not specifically refer to the master stream device known as a deck gun. The hoseline nozzle is a standard tool for directing water in smaller streams, but does not deliver the same volume as a turret pipe. A jet stream cannon and water tower systems also have their own functionalities but do not match the specific characteristics and operational context of the turret pipe device. Understanding this distinction is crucial for effectively identifying and utilizing the appropriate equipment in firefighting scenarios.