for airforce u can say that but for navy thats not the case at allIndia can't survive on importing weapons... All your strongest weapons are imported
almost all of our new n major ships whether they r destroyers, frigates, corvettes, nuclear subs even the new aircraft carrier r made in india
n even for our imported major weapons like scorpion subs r under tot n r being manufactured in india so we do have all the technical know how for their maintenance n repairs even during war times
rather u should worry more about ur own manufacturing capacities as we r yet to see a corvette from pakistan