2,595 km 1.000-meter gauge, government owned; 179 km Ports: primary - Ch'ongjin, Hungnam (Hamhung), Najin, Namp'o, Wonsan; secondary - Haeju, Kimchaek, Kosong, Sinuiju, Songnim, Sonbong (formerly Unggi), Ungsang Merchant marine: 536 ships (1,000 GRT or over) totaling 2,882,727 GRT/4,463,879 DWT; includes 2 cargo, 4 refrigerated cargo, 21 container, 5 roll-on/roll-off cargo, 9 roll-on/ roll-off, 6 refrigerated cargo, 3 refrigerated cargo, 1 cargo/training, 11 oil tanker, 10 chemical tanker, 6 chemical tanker, 15 bulk carrier, 2 oil tanker, 2 liquefied gas, 3 container
encirclement