

This same emphasis on keeping communication open in spite of all difficulties is reflected in repeated instructions for the dispersal and revetting of transmitters and the camouflaging of radio stations. At 0730 we restored the line at 0950 all lines were restored at 1500 they were severed again." (Comment: The document further indicates that on that day 18 despatches of 606 words were cleared to TOKYO.) Although we worked to keep the lines operational since last night, the lines were cut in as many as ten places due to shells. Immediately set out to restore the lines. (Comment: This refers to the control lines from the central station to the various transmitters on the island.) At 2220 all lines were severed by bombardment. By the utmost effort in maintaining the lines, at 9 o'clock.all lines except the second were open and working well. Although there was a bombardment close to us, it did not affect our personnel or equipment. There is some evidence that the system is handicapped by a shortage of trained personnel, but an evident determination exists to make the best use of existing facilities.Ī captured log of the Control Station of the Army Signal Office at SAIPAN gives an example of what Japanese communicators accomplish under the most adverse conditions: The newest enemy equipment compares favorably with our models. Older equipment is obsolete by American standards but ruggedly built. Japanese communications in general comprise a complex, modern system, highly flexible and efficient. There is not enough material available for an over-all survey, and Army communications have therefore been treated chiefly in relation to the Navy. Information on Army communications is far less satisfactory. Within these limitations, however, a fair picture may be drawn of Japanese Naval radio communications. It should he remembered, therefore, that the data given represents Japanese theory rather than practice, and that much of the information may now be outdated. This article on Japanese radio communications is based on captured documents, with some information added from interrogations of prisoners-of-war. Japanese Radio Communications and Radio Intelligence Introductory
