Sea Legs

Sea Legs (also known as Set Adrift, Balance of Power and Bermuda Triangle) is a recurring physical endurance challenge that debuted in and has since reappeared in, ,  and.

Rules
Each player must balance on a floating platform at sea for as long as possible. Additional rule stipulations may require the contestants to remain in a specific position (such as a crouch, as seen in ) or may increase the difficulty by increments (as seen in, and ). The last person left standing wins immunity.

History
In, the challenge was the first after the merge and Kathy won.

In, the castaways had to balance on a platform at sea using only hands and feet. Lillian won the Final Immunity Challenge.

In, the challenge was the Final Immunity Challenge. The castaways would balance on a larger platform and every fifteen minutes change for a minor. Terry fell first, then Aras made ​​a deal with Danielle to be taken to the final 2 if he let her win the challenge.

In, after balancing for over two and a half hours, Andrea and Brenda made ​​an agreement to stay on top of the platform with one leg to decide who would win. Brenda fell and Andrea won immunity and a clue for the Hidden Immunity Idol.

In, the contestants had to stand on triangular shaped platforms. After 15 minutes the contestants had to move to the next highest foothold. The challenge intensified after 30 minutes when the castaways had to balance on the top of the platform. In the end, Woo beat Tony to win individual immunity.

In the challenge will reappear under the same format as in  and. At some point during the challenge Jeff Probst will offer the contestants an advantage in the game if they jump off their platforms.

Trivia

 * Despite the many renditions of this challenge, the most recent versions have been triangular with increments that become more difficult.
 * This version is seen in both and Survivor: Cagayan.
 * This challenge has only been used as an individual Immunity Challenge.
 * Three out of the five times the challenge was used the merged tribe color was black.
 * Survivor: Caramoan is the only season to have the challenge appear and not have it be the opening or final individual Immunity Challenge.
 * Woo Hwang is the first and only male contestant to win this challenge.
 * Spencer Bledsoe and Tasha Fox are the only castaways to compete in this challenge twice.