Which type of rocket is used for target marking or incendiary effects?

The type of rocket used for target marking or incendiary effects is white phosphorus. White phosphorus is a chemical compound that ignites spontaneously in air and can produce a significant incendiary effect. This substance is often utilized in military applications for its ability to create smoke screens and mark targets for airstrikes or artillery, as well as to cause fires. Its unique properties allow it to burn intensely, creating both a visual indicator for friendly forces and a dangerous environment for the enemy. This makes it particularly effective for both signaling and engaging in psychological operations, as the burning phosphorus can also cause severe burns to personnel caught in its vicinity.

In contrast, high explosive rockets are designed primarily to destroy targets through explosive force, rather than marking or incendiary purposes. Ballistic rockets follow a predetermined path without guidance and are not specifically designed for marking but rather for delivering explosive payloads over distance. Guided rockets are also focused on precision strikes against specific targets through advanced guidance systems, rather than providing the marking capabilities that white phosphorus rockets offer. Thus, white phosphorus is the correct answer for its role in marking and incendiary applications.