Each submarine will be equipped to carry up to 12 K-15 submarine-launched ballistic missiles (SLBM), which have a range of 700-750 km. Ultimately, India hopes to equip them with 4 K-4 SLBM, which have ranges of up to 3,500 km. It just began testing K-4 SLBMs this year, however, so it’s unclear when those would become available.
I agree. This is a slender reed to be holding the Dragon at risk. It will be some time before the IN develop expertise operating these in contested waters like the South China Sea.
750 km is just fine for an SLBM deterrent via China.
Any significant target is on the coast or very near it, and this thing can easily get to the Pacific/China sea within 750 km of anything worth shooting a nuke at.