To avoid being seen as shameless, the trio didn't insist on staying for the meeting. This was especially true in Shane's case. The strategy meeting was continued afterward with their exit.
With three hours left to midnight, the seven of them had to construct a temporary strategy to tackle the Forest Zone in complete darkness. Multiple ideas were suggested even the army whistle's trick.
Although outdated, it was a considerable strategy based on how simple and precise the message could be sent. Added the fact this whistle trick was taught as a subject in the academy made it exactly what the squad needed right now.
From the expectation of how terrible their line of sight could be, this whistle stunt could be what would save their life in an emergency.
