Danger in the depths: submarine disasters highlight risks


A National Search and Rescue Agency rescue ship sails to join the search for submarine KRI Nanggala that went missing while participating in a training exercise on Wednesday, off Banyuwangi, East Java, Indonesia, Friday, April 23, 2021. Rescuers continued an urgent search Friday for an Indonesian submarine that disappeared two days ago and has less than a day’s supply of oxygen left for its crew. (AP Photo)

BANGKOK (AP) — The disappearance of an Indonesian submarine off the resort island of Bali follows dozens of other disasters in the depths of the world’s vast seas. Military secrecy limits public access to details of accidents that show technological advances are still no match for dire risks at great depths. A search continued Frida y for the KRI Nanggala 402, with less than a day’s supply of oxygen left for its 53 crew members, as concern mounted that it may be stranded in waters too deep to reach or recover. That has been true of submarine disasters in the past. Here are some of them:


Fourteen seamen died on a RUSSIAN nuclear submarine in the Barents Sea in 2019 due to toxic fumes from a fire. The Kremlin did not divulge the name of the sub, but Russian media said it was a nuclear-powered research vessel called the Losharik that was designed for sensitive missions up to 910 meters (3,000 feet) deep.

Russia lost 20 crew aboard its nuclear-powered Nerpa, part of its Pacific Fleet, in 2008 after a firefighting system was accidently triggered. That was Russia’s deadliest submarine accident after an explosion caused the sinking of theKursknaval submarine on Aug. 12, 2000, killing all 118 crewmembers.


ARGENTINA’S ARA San Juan disappeared on Nov. 15, 2017, killing all 44 crewmembers, as it was returning to its base in Mar del Plata after military exercises. The wreckage was found during a search by Ocean Infinity of the U.S. almost a year later at a depth of about 900 meters (nearly 3,000 feet) east of Patagonia’s Valdes Peninsula. A legislative probe found the disaster resulted from the inefficiency of naval commanders and budget limitations, not an attack or collision. The submarine had been cut in half when it was refitted in 2008-14 and experts said that could have compromised its safety.


CHINA’s Great Wall Ming 361 was reported lost in 2003 in the sea between Shandong and North Korea. The 70 people aboard suffocated when the sub’s diesel engines malfunctioned and consumed all its oxygen. It was the first time China disclosed a fatal submarine accident.


FRANCE, ISRAEL, THE U.S., AND USSR all lost submarines in 1968. France’s Minerve was not found until 2019, when it was discovered in waters east of its home port, Toulon. It sank in rough seas two days after the Israeli Navy’s INS Dakar disappeared in the eastern Mediterranean with more than 60 people aboard. That submarine’s location was unknown until 1999, when it was located 2,900 meters (9,500 feet) below the surface between Crete and Cyprus. The Soviet Union’s K-129 and the USS Scorpion also were lost that year.


FRANCE also lost the Daphne class submarine Eurydice and its 57 crew in 1970 when it exploded off the coast of Toulon.


The deadliest U.S. submarine disaster was the sinking of the nuclear-powered USS Thresheron April 10, 1963, killing all 129 crew on board during a test dive in the Atlantic Ocean about 360 kilometers (220 miles) off Massachusetts’ Cape Cod. Documents made public in 2020 showed the sub imploded as it descended more than 240 meters (800 feet). The disaster helped drive safety improvements.


AUSTRALIA’S AE1 submarinewas lost off the New Guinea island of New Britain in September 1914 with 35 Australian, New Zealand and British crew in the first Allied submarine loss of World War I. It was located 300 meters (984 feet) below the sea’s surface only in December 2017, 103 years later.


INDONESIAN navy officials say an electrical failure could have prevented the KRI Nanggala 402 from using emergency procedures to resurface. The discovery of an unidentified object with high magnetism in the area, at a depth of 50 to 100 meters (165 to 330 feet), raised hopes it might be the missing submarine. But the navy has said it may be at 600-700 meters (2,000-2,300 feet), much deeper than its collapse depth — the depth at which water pressure would be greater than the hull could withstand. The vessel’s collapse depth was estimated at 200 meters (655 feet) by a South Korean company that refitted the vessel in 2009-2012.


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