1942 IJN submarine operations |
East Africa Coast |
| SS | I-10/F, I-16, I-18, I-20, I-30 |
| CX | Aikoku Maru, Hokoku Maru |
| 42/04/16 | departed Hashirajima for Penang |
| 42/04/30 | arrived Penang, I-16, I-18 and I-20 loaded midget submarines, then departed Penang |
| 42/05/20 | I-10 send floatplane over Durban, South Africa, in next days also East London, Port Elizabeth and Simonstown |
| 42/05/29 | I-10 - air reconnaisance Diego Suarez, Madagascar |
| 42/05/30 | midget subs from I-16 and I-20 damaged Ramillies and AO British Loyalty at Diego Suarez |