SOS

SOS is a recurring design challenge that made its debut in.

Rules
Each tribe must create a believable SOS signal. After each tribe submits their signal, they are judged based on several criteria, including visual appeal, creativity, usability, and a written description of the signal. The tribe with the highest amount of points wins.

History
This challenge first appeared during as the first immunity challenge after the tribe swap. Havana won this challenge.

It later reappeared ten seasons later during as a tribal immunity challenge. Atonga won this challenge, continuing their winning streak.