Which of the following best describes the function of the 60mm mortar?

The function of the 60mm mortar is primarily to provide indirect fire support, which includes illuminating areas during nighttime operations. Illumination support is essential for enhancing visibility across the battlefield, allowing friendly forces to engage enemy targets effectively and to maintain situational awareness. The 60mm mortar is capable of firing illumination rounds that produce a bright light, illuminating areas for a duration of time, which can greatly aid in nighttime operations.

While standard area suppression and target engagement at long ranges are important aspects of mortar capabilities, the specific emphasis of the 60mm mortar is more aligned with close support functions, like illumination, rather than long-range engagement or suppression in a general sense. Close air support, while crucial for an infantry platoon, falls under the responsibility of air assets rather than mortar systems. Therefore, illumination support is the most accurate description of the primary function of the 60mm mortar in a combat setting.