NB Divers is a PADI 5-Star Career Development Center (CDC) — PADI's top rating, reserved for centers with an "instructor of instructors" on staff — based in Songpa-gu, Seoul. Founded in 2000, the center has operated for 26 years without an accident and has issued more than 5,874 PADI certifications, with over 10,000 people trained including trial dives. Alongside PADI courses, it runs training sessions at a 26–36m deep pool near Seoul, ice diving trips in January–February, and diving trips to Korea's East, West and South Seas, Jeju Island and Ulleungdo.