The Korean People's Army Naval Force (KPANF; Korean: 조선인민군 해군; Hanja: 朝鮮人民軍 海軍; Chosŏn-inmingun Haegun; lit. 'Korean People's Military Navy') or the Korean People's Navy (KPN), is the naval service branch of the Korean People's Army, which contains each branch of the North Korean armed forces. There are some 780 vessels including 70 midget submarines (including the Yono-class submarine and Sang-O-class submarine), 20 Romeo-class submarines, and about 140 air cushioned landing craft.