Type J1 submarine

The Type J1 submarine (巡潜1型潜水艦, Junsen ichi-gata sensuikan, "Cruiser submarine Type 1"), also called I-1-class submarine (伊一型潜水艦, I-ichi-gata sensuikan) were large cruiser submarines (Junsen type submarines) of the Imperial Japanese Navy. Four boats were built between 1926 and 1929. These boats, based on the KD2 and U-139 designs, were of a junsen, or cruiser, type with an impressive range of 24,000 nm. Elderly by 1941 they were among the first Japanese submarines converted to supply duty.

Type J1 submarine

The Type J1 submarine (巡潜1型潜水艦, Junsen ichi-gata sensuikan, "Cruiser submarine Type 1"), also called I-1-class submarine (伊一型潜水艦, I-ichi-gata sensuikan) were large cruiser submarines (Junsen type submarines) of the Imperial Japanese Navy. Four boats were built between 1926 and 1929. These boats, based on the KD2 and U-139 designs, were of a junsen, or cruiser, type with an impressive range of 24,000 nm. Elderly by 1941 they were among the first Japanese submarines converted to supply duty.