Skip to comments.Indonesian Rescuers Recover Debris Believed to Be From Missing Submarine - Official
Posted on 04/24/2021 7:27:57 AM PDT by BenLurkin
The Indonesian navy chief of staff said a scan had detected the submarine at 850 metres (2,788 feet), well beyond its survivable limits. The submarine, which disappeared as it prepared to conduct a torpedo drill, is designed to withstand a depth of up to 500 metres (1,640 ft).
(Excerpt) Read more at usnews.com ...
Preliminarily it sounds like maybe the inner torpedo tube door wasn’t closed and/or secured when they flooded the tube and opened the outer tube door.
An Argentine boat was lost a few years back, too. I don’t recall the cause of that one.
What could cause a sub to be lost during a torpedo drill, I wonder?
Reading the article, it doesn’t say what thpe of debris was recovered. I wonder if that might yield clues to what happened?
Wasn’t that Russian leviathan, the Kursk, lost when a torpedo malfunctioned and exploded? It sank in water shallower than its length!
If it went below crush depth, it would likely make a very loud noise that would be heard by other submarines around the world.
There are about a million things that can wrong and sink a dub at depth. Hard to say if the debris recovered will shed much light on the casualty that happened. There is certainly the chance that the debris will help the investigators. Remember though, the investigation by the Indonesians is unlikely to report the true cause of this sinking because their main goal will to be the need to save face. Saving face and covering up anything that will cause institutional embarrassment will be the overarching goal of any report about this sub sinking.
IIRC, in Herbert Werner's book about his U-Boat experiences, "Iron Coffins", they discovered by accident, why some boats disappeared without a trace.
They left the outer doors of their torpedo tubes open while in port and when bombs were dropped, the concussion blew open the inner doors. He figured some boats had done that after an attack and the following depth charge attacks did the same.
Here's a gCaptain article that gives some background:
Missing Indonesian Submarine Was Old And Overloaded
The Indonesian navy’s missing submarine may have been too old and overloaded when it embarked on a military exercise on Wednesday, according to a defense analyst. The KRI Nanggala-402 that disappeared in waters off Bali island was carrying 53 crew during training, Indonesia’s defense ministry said. A submarine of that class has a maximum capacity of 40, according to Ridzwan Rahmat, principal defense analyst at Janes.
Its age does not help either. At over 40 years, the Cold War-era submarine is among the world’s oldest in service today and was not built to withstand pressure beyond 230 meters (754 feet) deep, Ridzwan said.
This adds greater urgency for rescuers who are racing against the clock to find the missing submarine and its crew. Air in the KRI Nanggala-402 is estimated to be breathable only until 3 a.m. on Saturday, Jakarta time, after which oxygen is insufficient, according to navy Commander Admiral Yudo Margono.
Survival rates are low for victims of submarine accidents in waters deeper than 200 meters. While people can self-evacuate to the surface in shallower waters less than 50 meters, pressure at greater depths is strong enough to crush steel hulls and lungs, according to salvage experts. About 118 crew died in 2000 when the Russian nuclear stealth machine Kursk exploded then came to rest on the ocean floor off Murmansk. About 44 crew perished when the aging Argentinian submarine ARA San Juan went missing in 2017. Navies in Singapore and Malaysia have sent ships equipped with deep submergence rescue vehicles to aid in the search.
The U.S.’s Poseidon airship is also en-route from the Philippines, while two Australian vessels have arrived on-site, Indonesia’s army spokesperson Djawara Whimbo said on Friday.
Meanwhile, Indonesia has deployed more than 20 vessels to scour the waters and is conducting aerial surveillance after an oil spill was found around the submarine’s starting dive position.
“Hopefully, this can be found soon while there is still spare oxygen,” the navy’s Margono said in a Thursday statement.
Questions are being raised as Indonesian authorities try to shed light on the Southeast Asian nation’s first submarine disappearance. According to the Janes analyst, the incident could have been avoided if the vessel wasn’t overloaded or kept in service for so long.
The typical life cycle for a naval submarine is only about 30 to 35 years, Ridzwan said. KRI Nanggala-402 was built in Germany in 1977 and joined the ranks of the Indonesian navy in 1981. It was supposed to be decommissioned but because of limited funding, the government decided to upgrade it instead in South Korea, he said.
“It was an accident waiting to happen,” Ridzwan said.
Rescuers will likely have to break the hull or conning tower as the submarine doesn’t have a rescue seat, he said. However, hopes of survival are growing dim. “It’s possible people don’t survive,” he said.
–With assistance from Claire Jiao.
As I said, about a million things can cause a sub to sink at depth. Also, the casualty might not have even been part of the torp drill.maybe a high pressure pipe broke in the engine room, or maybe there was a problem and their batteries exploded and breached the pressure hull. A lot of different things could have happened. Submarining is a very dangerous business especially when serving in a third world navy; they’re not known for good maintenance or training.
“Wasn’t that Russian leviathan, the Kursk, lost when a torpedo malfunctioned and exploded? “
I wonder what went into the decision to overload the complement of the ship by 33%? If serving a tour on a sub is a resume enhancer, maybe that could be a reason. Or maybe they needed extra specialists aboard just to keep it maintained/in repair?
I served on the Grenadier (SS-525), 1972-73. It’s keel was laid in ‘44, finished in the early ‘50s.
We spent more time in port than out due to repairs. Our various leaks at 200 feet were about 10 gallons a minute. The pumps could handle it.
It was decommissioned in ‘73 and we sold it to the Venezuelans. Apparently they made use of it until the early ‘90s. I was worried about it’s seaworthiness when I was on it!
Debris believed to be from the sub? Well, it could be the Titanic’s deck chairs, but doubtful.
Sounds like Ice Station Zebra.
Indonesian Rescuers Recover Debris Believed to Be From Missing FLIGHT 828.
Indonesian Rescuers Recover Debris Believed to Be From Missing Oceanic Flight 815.
Indonesian Rescuers Recover Debris Believed to Be From a destroyed alien spacecraft.
Is there going to be a rescue attempt for the survivors? /s
it 1000 feet deeper than designed max pressure.I would bet its crushed, which would cause hull breach.
I should have also posted a translation:
I join in your sorrow. I am praying you [Indonesians] receive strength and support from God. God bless you.
Where was the sub made?
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.