What must happen upon the detection of the enemy by the first member of the patrol?

When the first member of the patrol detects the enemy, giving a silent signal for the patrol to freeze is crucial for maintaining operational security and avoiding immediate detection by the enemy. This action allows the patrol to halt their movement without drawing attention, enabling them to assess the situation more effectively. By freezing, the patrol can listen, observe, and decide the appropriate course of action without creating noise or movement that could reveal their position to the enemy.

Maintaining silence during such a critical moment is fundamental in a tactical environment, as any sudden noises or movements could compromise the entire patrol's safety. It also provides an opportunity for other members of the team to prepare for potential actions, such as engaging or retreating, without alerting the enemy prematurely.