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GENERAL HEADQUARTERS, FAR EAST COMMAND ADJUTANT GENERAL'S OFFICE RADIO AND CABLE CENTER INCOMING MESSAGE SECRET ROUTINE SM jag EPF 7 May 49 FROM : CG USAFIK TO : DA (INTELLIGENCE DIVISION) INFO : CINCFE (G-2) NR : ZGBI ?9) (WEEKA NUMBER 71, PERIOD 30 APRIL TO 7 MAY 49) DECLASSIFIED PER JCS LTR OF 20 AUG. 75 Current: 3. . UNCOK committee plans go to Cheju-Do on 8 May and observe the 10 May elections on the island for two assembly seats. 2. North Korea. Current. 2. The North Korean government has established a submarine base in the Yonghung Bay area (1040-1860) for the purpose of supplying guerrilla organizations in South Korea. There are reportedly 3 submarines assigned to this base, described as "German F type"submarines. The commandant of the base is Kang Pa, a native of Cheju Do, who purportedly received submarine training in Vladivostok. By March of 1949, three successful cargo transport missions had been made to Cheju Do. (F-6) Comment: Rumors of submarine sighting off Cheju Do have not been confirmed but the use of submarines in supplying isolated guerrilla units has been proven feasible and it is possible that North Korea is using or planning to use submarines for this purpose. ALSULO comment: It is not believed that the North Korean Navy can or could support a submarine or a submarine base at this time. The water depths in Yonghung Bay do not lend themselves to the establishment of a submarine base in the usual meaning of such a base. It seems more probable that a base may have been established in this area for use as a lay-over point for Soviet operated submarines where North Korean guerrilla units and supplies may be picked up for transportation to South Korea and where fresh water and supplies may be replenished.