Tag
diesel-electric attack sub
![India’s New Attack Subs to Be Fitted With Imported Air Independent Propulsion System India’s New Attack Subs to Be Fitted With Imported Air Independent Propulsion System](https://thediplomat.com/wp-content/uploads/2018/03/sizes/thumbnail/thediplomat-first_torpedo_firing_trials_of_ins_kalvari_s50_-_1.jpg)
India’s New Attack Subs to Be Fitted With Imported Air Independent Propulsion System
By Franz-Stefan Gady
The Indian Navy has reportedly abandoned plans to install an indigenous air-independent propulsion system on Project-75 I subs.
![Japan Launches Second Soryu-Class Attack Sub Fitted With Lithium-Ion Batteries Japan Launches Second Soryu-Class Attack Sub Fitted With Lithium-Ion Batteries](https://thediplomat.com/wp-content/uploads/2019/11/sizes/thumbnail/thediplomat-p1742633.jpg)
Japan Launches Second Soryu-Class Attack Sub Fitted With Lithium-Ion Batteries
By Franz-Stefan Gady
The Toryu is the final boat of the Soryu-class of diesel-electric submarines and will be commissioned in 2021.
![India Launches 4th Kalvari-Class Attack Submarine India Launches 4th Kalvari-Class Attack Submarine](https://thediplomat.com/wp-content/uploads/2019/05/sizes/thumbnail/thediplomat-016kha.jpg)
India Launches 4th Kalvari-Class Attack Submarine
By Franz-Stefan Gady
India’s latest diesel-electric attack submarine was launched in Mumbai on May 6.
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