The K-15 Sagarika (Oceanic) submarine-launched ballistic missile (SLBM), which has a range of at least 700 km (some sources claim 1000 km) forms part of India's nuclear triad and is extensively tested to be integrated with the Arihant class of nuclear submarines.[203][204] A longer range submarine launched ballistic missile called K-4 is under induction process, to be followed by K-5 SLBM.[205]