Shelter Circle
A few distant sites can change the whole rescue.
Tap optional sites to send them by shuttle. The circle automatically becomes the smallest possible shelter. Keep the protected ◆ sites and stay within the shuttle’s seat limit.
Read the boundary
The farthest-looking site is not always the best one to transfer. Two opposite sites or three boundary sites determine the circle. A shuttle choice can move its center and expose another limiting site.
Crossed sites travel safely by shuttle; they are not abandoned. Protected sites cannot transfer. The dashed circle shows the available shelter radius at the current center; the solid circle is the exact radius needed.