"Central Daily" article points out that, according to the newspaper by the Korean West Sea Fleet base in the sea near the satellite image of Nampo, North Korea informed of where the parking of the new "Harmony (Music)-B-class" semi-submarine. 17 meters long, 4 meters wide, 2.2 m semi-submarine deck on the right side about 4 meters long cylindrical objects. A source said: "This object is developed by the Korean army light torpedo tubes." Some time ago on the North Korean military intelligence experts and stakeholders to determine characteristics of semi-submarines in the point of view is difficult to install from the torpedo. But the military assumed that half of North Korea's recent submarine was modified, extended a half-submarine hull, propulsion and navigation, enhancing the power of the already loaded torpedoes.

Satellite pictures also show that the Korean side by side before the new semi-submarine moored 35 meters 32 meters-and mother-ship of the two-level agents. Nampo base in another picture, also parked there VEGA-1 and other agents support vessels. The role of these vessels is dragging the semi-submarines in the attack will put it in the sea. South Korean military official said: "Secret Service agents mothership support vessel and a 'Sea King Kong (Music)', 'Cong stone boat (sound)' and other pseudonym.

Reported that this is the first confirmed North Korea South Korea in the semi-submarine torpedo tubes installed. South Korean military-related agencies were concerned that such a semi-submarine could be used to water the South Korean navy ships to torpedo attack, so are actively developing policies to avoid being attacked. South Korean military official said: "This year in July the East China Sea joint ROK-US naval exercise ('indomitable will'), and other high-intensity exercise in preparedness for a semi-submarine intrusion, provocation of exercise because this background."