In the SUDOT whistle command system, how many whistle blasts request "stop"?

In the SUDOT whistle command system, a single whistle blast is universally recognized as the signal to "stop." This concise method allows for clear communication, especially in high-stress or noisy environments where audible commands may not be easily heard or understood. The use of one blast ensures that all team members immediately understand they need to halt their actions, which is critical in maintaining safety during rescue operations. The simplicity of this command helps to reduce confusion and enhances overall operational efficiency. Alternative whistle signals exist for different commands, but a single blast's straightforward nature makes it particularly effective for an urgent stop command.