"For the very first, the BRP Conrado Yap was able to detect submarine while passing and (patrolling) off Palawan waters. This is the first time for the Navy (after a long time to have an asset capable of detecting submarines). It is very exciting," Navy flag-officer-in-command Vice Admiral Robert Empedrad said in the vernacular during an interview Wednesday night at Acero Hall, Bonifacio Naval Station, Fort Bonifacio, Taguig City.