JAKARTA, Indonesia—Indonesia’s navy is searching for a submarine that went missing north of the resort island of Bali with 53 people on board, the military said Wednesday. Military chief Hadi Tjahjanto said the KRI Nanggala 402 was participating in a training exercise when it missed a scheduled reporting call. The submarine is believed to have disappeared in waters about 60 miles (95 kilometers) north of Bali, he said. Tjahjanto said the navy has deployed scores of ships to search the area, including a hydrographic survey ship, and has asked for help from Singapore and Australia, which have submarine rescue vessels. Local media reports said the navy believes the submarine sank into a trough at a depth of 700 meters (2,300 feet). The Defense Ministry said in a statement that the submarine lost contact after being granted clearance to dive. It said a helicopter later spotted an oil spill near the …