(a) whether the Defence Research and Development Organisation (DRDO) has developed four Naval Systems for the Indian Navy and if so, the details thereof;
(b) whether these systems have been designed and developed by a laboratory of DRDO and if so, the details thereof;
(c) whether these systems are likely to provide a fillip to self-reliance in this critical area of technology; and
(d) if so, the details thereof and the extent to which the underwater surveillance capability of the Indian Navy will get a boost from these new systems?