ww2 IJN subs

IJN Large oceanic submarines 1934-45. KD VIa (Kaidai-roku-gata-ē, I-68/I-168-class): I-68, I-69, I-70, I-71, I-72, I-73, renamed +1 1942 KD VIb (Kaidai-roku-gata-bī, I-74/I-174-class): I-74, I-75, renamed +1 1942 The Kaidai VI type (“Navy large type VI”) or I-68-class (海大5型) Kaidai-go-gata, Project number S31, for the KD VIa six boats I-68-70 all completed in 1937 and for … Read more

Japan 1934-45: I-65/165, 66/166, 67/166 large oceanic submarines. The Kaidai V type (“Navy large type V”) or I-65-class (海大5型) Kaidai-go-gata, Project number S29, built under the 1923-1928 programme, had only I-165, I-166, and I-67 which construction, all completed in 1932. The design was an upgrade with a new deck gun going from 50 caliber to … Read more