Karwar: President Droupadi Murmu undertook her maiden submarine sortie aboard INS Vaghsheer, a state-of-the-art Kalvari-class submarine here yesterday.  Accompanied by Chief of Naval Staff Admiral Dinesh K. Tripathi, she embarked on the submarine at Karwar Naval Harbour. During over 2-hour-long sortie, she interacted with submarine crew and witnessed operational demonstrations. Murmu became the second President…