It is the first SF space drama to be attempted in Korea.
SAA stands for "South Korean Space and Aeronautics Administration"
Adapted from 2014 short movie "The sea of tranquilty" also by director Choi Hang-Yong
Hep Sung-Tae (Kim Jae-Sun) & Gong Yoo (Han Yoon-Jae) played in "Squid Game") although they shared no scenes.
The English title, The Silent Sea, is different from Sea of Tranquility , the name of the actual calm sea where Neil Armstrong and Buzz Aldrin flew to the moon on Apollo 11.