What type of M203 round is utilized to mark the location of personnel?

The ground marker round is specifically designed for marking the location of personnel in a tactical environment. This type of round is typically used to highlight an area, making it easier for supporting units to identify the position of friendly forces or to signal for assistance. The bright color emitted by the ground marker round can be seen from a significant distance, allowing for clear communication during operations.

Illumination rounds, while they do provide light in a given area, are more about illuminating a space rather than pinpointing exact locations. High-explosive rounds are intended for destroying targets and not for marking purposes, as their function is to inflict damage. Smoke rounds, although useful for providing cover or obscuring visibility, do not specifically indicate the location of personnel but rather create a smoke screen for tactical movement or signaling. Thus, the ground marker round remains the most effective and accurate in marking personnel locations.