A Sri Lankan Navy sailor died while undergoing diving training at Naval base in Kochi, India, the Press Trust of India reported.The Navy said that the 39-year-old Petty Officer (Diving) YPNR Weerasinghe, while carrying out a practice dive in the Ernakulam Channel as part of routine training procedure, failed to surface. “The sailor was administered prompt first aid, and evacuated to the Naval Hospital. All attempts at reviving the sailor proved unsuccessful and he was declared dead at around 3 pm (yesterday),” the Indian Navy said in a release. The sailor was located after an immediate search was carried out by the attendant supervisory training staff. He had been undergoing training in India since April 3, it said. The Sri Lankan authorities have been informed about the incident.A Board of Inquiry has been ordered to ascertain the cause of the incident, the Indian Navy said.