Even Duke recognized that what Rose was doing was a valuable opportunity to eliminate the zombies approaching their perimeter while they surveyed the area.
Rather than interrupt her, he chose to offer her some pointers to help enhance her skills, making them more applicable in real battles and situations like this.
Thanks to Rose's assistance, they were able to move more quickly, encountering fewer lurking zombies along their path since she had already dealt with them from a distance.
While everyone else focused on scanning the surroundings with the drone and Duke concentrated on mapping, they covered the entire eastern side in just half a day, uncovering only one hole.
Next, they turned their attention to the northern side, continuing their efforts.
By the end of another half-day, just before dark, they had managed to cover half of the northern area.
They uncovered three gaping holes in the ground leading to the sewers.