.....................................................................5 3. Uurimislaev NATSUSHIMA............................................................................................................6 4. Uurimislaev KAIYO........................................................................................................................7 5. Ookeani uurimislaev MIRAI............................................................................................................8 6. Toetuslaev YOKOSUKA..................................................................................................................9 7. Süvamere uurimislaev KAIREI......................................................................................................10 8. Uurimislaevad HAKUHO MARU ja TANSEI MARU..................................................................11 9. Uurimislaevad ARANDA ja SALME............................................................................................12
The first batch of recruits—60 of them—were drawn form foreign-language schools and commercial colleges to become the first civilians in the Tokumu Han. The second batch consisted of about 70 reserve officer candidates selected from about 500 in basic training on the basis of their competence in foreign languages. (These signal intelligence groups differed from classes learning cryptography.) During a five-month course at the Naval Communication School at Kurihama near Yokosuka— hard by the Commodore Matthew Perry monument—they practiced International Morse, studied the elementary Oriental Tenji and Tenchi ciphers as well as the Occident's more advanced Porta and Vigenere, and learned how to break codes and ciphers. Six classes, each larger than its predecessor, were trained during the war. Some graduates were assigned to communications intelligence in the intelligence units of fleet and force headquarters. In
annaabi.ee 
