＼PR!／
There is a person named Richard (@EmbersOfSuns) who does #OSINT about submarines around the world.
Him:https://twitter.com/EmbersOfSuns
This person requested information about the Maritime Self-Defense Force's Soryu class submarines.
Figure 1: Bridge of the Soryu class submarine
URL: https://twitter.com/EmbersOfSuns/status/1613677551330951171
Mr. Richard's design has been very helpful in understanding submarines.
As a thank you, we will provide information from Japan.
(Due to the use of Deepl translate)
（前回記事）：『ついにFCS-4開発開始となるか？！【海上自衛隊】』
＼こちらもご参考に！PR／
(1) Who am I? I am a naval officer involved with submarines.
If you suddenly send me information from a suspicious person in Japan, the information will be considered inaccurate.
Who are you? What is your background? I will answer the following questions.
1.1 I am a retired JMSDF officer and submarine engineer.
I writer a blog in Japan under the name Penguin.
I am a former officer of the Japan Maritime Self-Defense Force (retired Navy Lieutenant Commander ).
During my service in the JMSDF, I was in the department that maintained submarine equipment, surface ship equipment and special forces SBU equipment
Figure 2 SBU
URL: https://pbs.twimg.com/media/E_YsRMbVQAEdh0S.jpg
I was involved in submarine construction and repair, and was involved in the construction phase of the Soryu class submarine.
It was also involved in the development of the FCS-3, which is equipped by the Maritime Self-Defense Force ship.
（関係記事）：『【艦発隊】特別警備隊（SBU）に関係する研究について』
Figure 3 FCS-3
Citation wiki
1.2 Japanese submarine information is strictly confidential and information is difficult to obtain.
When conducting OSINT, you may be troubled by the fact that information on Japanese submarines is almost impossible to obtain.
In Japan, there was a TOP SEACRET leak in December 2022.
Figure 4: Military Secrets
Citation wiki
Therefore, submarine information has always been difficult to obtain.
The information we provide this time is only delivered from the information disclosed in Japan.
＼潜水艦諜報戦！PR／
 | 価格:2,980円 |
＼PR!／
(2) The object is an ESM antenna.
In conclusion, the object is an ESM antenna.
The model number is called "ZLR-3-6" and it is a Direction Finding (DF) antenna.
2.1 Radio Direction Finding and Information Gathering Antenna
You might think that an ESM sensor on a periscope would be sufficient for a submarine.
Figure 5: Submarine periscope
Citation wiki
However, after the Souryu class submarine, the wideband radio wave information gathering capability was required to be improved.
Therefore, a high-performance ESM antenna was installed for radio direction finding and submarine intelligence espionage(SIGINT MSSION).
＼SPECIAL DUTY!PR／
 | Special Duty A History of the Japanese Intelligence Community【電子書籍】[ Richard J. Samuels ] 価格:1,815円 |
＼PR!／
(3) Can someone pass the word to Richard (@EmbersOfSuns)!
I do not have an X account.
Therefore, I cannot provide information to Richard (@EmbersOfSuns) directly.
If possible, please get the information to him.
＼PR!／
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