Indonesia Indonesian Navy, Tentara Nasional Indonesia-Angkatan Laut (TNI-AL)

[JATOSINT]

https://twitter.com/i/web/status/1385130090816700417

 

[Captain Wales]

I thought Indonesian water are shallows thus would be easy to find the sub.

The western side of indonesia is shalow, the eastern part is deep water.
the navy training area were in the deep water area (perfect for submarine training)

 

[Umigami]

AL: Ada Temuan Kemagnetan di Kedalaman 50-100 Meter Laut Bali

Simak penjelasan Kepala Staf Angkatan Laut Laksamana Yudo Margono dalam keterangan pers terkait musibah KRI Nanggala-402 di Pangkalan TNI AU Ngurah Rai.

www.cnbcindonesia.com

Jakarta, CNBC Indonesia - Kepala Staf Angkatan Laut Laksamana Yudo Margono mengungkapkan temuan terkini perihal upaya pencarian KRI Nanggala-402 di perairan Bali, Kamis (22/4/2021). Menurut dia, KRI Rimau menemukan kemagnetan yang tinggi di suatu titik dengan kedalaman 50-100 meter.

Yudo menjelaskan, untuk memperkuat temuan itu, akan dipasang multibeam echosounder di KRI Rimau secara portabel.

"Mudah-mudahan KRI Rigel juga bisa datang ini nanti sehingga bisa lebih rinci lagi. Sehingga kelihatan di situ yang tadi ditemukan kemangnetan yang tinggi. Harapannya kemagnetan yang tinggi itu adalah KRI Nanggala," ujarnya dalam keterangan pers terkait musibah KRI Nanggala-402 di Pangkalan TNI AU Ngurah Rai, Bali, Kamis (22/4/2021).

KRI Rimau detect strong magnetic object in the depht of 50-100 meters. they try to check it with multibeam echosounder today.

 

[R4duga]

this mainlander need his account to be taken down

comment section from : https://www.instagram.com/p/CN9GgTzJtLg/

 

[this is crunch]

https://twitter.com/i/web/status/1385130090816700417

whoaa jay hind!
probably 6 to 7 days to arrive

 

[NEKO]

I thought Indonesian water are shallows thus would be easy to find the sub.

On a serious note, if she (or what remains of her) was indeed resting at the bottom at +/- 700 meter water depth then the best way to find her is by sending a DSRV down there. AFAIK no sonars can reach that depth.

On other serious note, the need to have sub rescue vessels equipped with DSRV and stationed not just in one but in all three fleet bases is real and have to be seriously considered

We have both shallow and deep water.

Finding it by using DSRV? But why? It is specialized for rescue not for search. Use side-scan sonar not DSRV, DSRV can be used for seaching a small area around the rough location of the sub, it is not equipped with search sensors and good propulsion (speed and endurance) to cover large search area.

The main problem is the crush depth.

 

[R4duga]

AL: Ada Temuan Kemagnetan di Kedalaman 50-100 Meter Laut Bali

Simak penjelasan Kepala Staf Angkatan Laut Laksamana Yudo Margono dalam keterangan pers terkait musibah KRI Nanggala-402 di Pangkalan TNI AU Ngurah Rai.

www.cnbcindonesia.com

Jakarta, CNBC Indonesia - Kepala Staf Angkatan Laut Laksamana Yudo Margono mengungkapkan temuan terkini perihal upaya pencarian KRI Nanggala-402 di perairan Bali, Kamis (22/4/2021). Menurut dia, KRI Rimau menemukan kemagnetan yang tinggi di suatu titik dengan kedalaman 50-100 meter.

Yudo menjelaskan, untuk memperkuat temuan itu, akan dipasang multibeam echosounder di KRI Rimau secara portabel.

"Mudah-mudahan KRI Rigel juga bisa datang ini nanti sehingga bisa lebih rinci lagi. Sehingga kelihatan di situ yang tadi ditemukan kemangnetan yang tinggi. Harapannya kemagnetan yang tinggi itu adalah KRI Nanggala," ujarnya dalam keterangan pers terkait musibah KRI Nanggala-402 di Pangkalan TNI AU Ngurah Rai, Bali, Kamis (22/4/2021).

KRI Rimau detect strong magnetic object in the depht of 50-100 meters. they try to check it with multibeam echosounder today.

crossing my fingers for the rimau , lets hope it's "melayang" at certain depth instead of "tenggelam" sunk.

 

[trishna_amrta]

I thought Indonesian water are shallows thus would be easy to find the sub.

Only the Sunda Shelf part are shallow (Malacca Strait Natuna Sea, Java Sea) Furthermore the Sunda Shelf is the limit of Asia continent (it stops somewhere east of Madura), beyond that such as Makassar Strait, Lombok Strait, Banda Sea, etc are not part of Asia continent

 

[trishna_amrta]

Recent Update
- Official Press Conference has been held
- The Submarine is still not found
- The naval hydroghraphic survey vessel KRI Rigel is expected to arrive on site by tomorrow ( Friday, 23 April)
- The Singaporean MV. Swift Rescue is expected to arrive on site by 24 April
- The Malaysian aid is expected to arrive on 26 April
- Maximum depth of the sub is confirmed to be 500 meters

summarized from various sources
-correct me if im wrong-

And how can one stating that the location has not been found yet at the same time able to determine the depth

 

[trishna_amrta]

72 HOURS!

https://twitter.com/i/web/status/1385126012996907018

That is bad. I don't think they brought enough candles to produce oxygen

 

[Captain Wales]

On other serious note, the need to have sub rescue vessels equipped with DSRV and stationed not just in one but in all three fleet bases is real and have to be seriously considered

the ideal solution just need one system but configured to be air transportable within 48 hours and use/chartered civilian vessel that capable and closest in the area to transport those system form land to the sea (site).
but it's unlikely we can configure like that, it mean we going to need C17 or similar size aircraft.

the realistic way is we buy something like SG swift rescue and station it on surabaya, it is somewhat in the middle of indonesia and much of our sub exercise occurred on those area where the water is much deeper and DSRV are needed to evacuate personel.
while on the western side, the water in much shallower where escape using Submarine Escape Immersion Equipment is possible and if we need DSRV we can call SG first (which is closer) while waiting for our own from surabaya to arrive.

 

[wekiweko]

We have both shallow and deep water.

Finding it by using DSRV? But why? It is specialized for rescue not for search. Use side-scan sonar not DSRV, DSRV can be used for seaching a small area around the rough location of the sub, it is not equipped with search sensors and good propulsion (speed and endurance) to cover large search area.

The main problem is the crush depth.

if the wreck lies below the effective range of sonar of those vessels on the surface then what is the point? you need to send a DSRV and look for it.

 

[Umigami]

if the wreck lies below the effective range of sonar of those vessels on the surface then what is the point? you need to send a DSRV and look for it.

how about towed sonar?

 

[trishna_amrta]

FYI for all
It seems some Indon medias blatantly copy paste what we discuss here without giving the slightest credit to whoever the author here. They merely translating it using machine translation.

To the journalist in question : mas, saya paham Anda kerja dikejar target artikel harian. Tapi kalau Anda main copas mentah2x apa yang kami diskusikan minimal kasih acknowledgment credit buat para forumer disini khususnya si penuliasnya. Jangan cuma jadi silent reader disini trus kau copas mentah2x. Brengsek kau kalau mainmu gitu

 

[wekiweko]

the ideal solution just need one system but configured to be air transportable within 48 hours and use/chartered civilian vessel that capable and closest in the area to transport those system form land to the sea (site).
but it's unlikely we can configure like that, it mean we going to need C17 or similar size aircraft.

the realistic way is we buy something like SG swift rescue and station it on surabaya, it is somewhat in the middle of indonesia and much of our sub exercise occurred on those area where the water is much deeper and DSRV are needed to evacuate personel.
while on the western side, the water in much shallower where escape using Submarine Escape Immersion Equipment is possible and if we need DSRV we can call SG first (which is closer) while waiting for our own from surabaya to arrive.

well, time is of the essence and considering SSK is much smaller than their SSN cousins, the crew will have much less time to survive. considering the width of our nation that is why I said we need at least three one on each fleet base.

on water depth I tend to disagree with the notion that it's all shallow water in western Indonesia (I know it was popularize by certain account since the def.pk time). If we are talking about the malacca straight then yes I believe that is true but Natuna and Andaman Seas are both in Western Indonesia and both can't be considered as shallow.

on Submarine Immersion Equipment, AFAIK it works within 0-180 meters so the crew would still in F up situation if the submarine lies below that depth

 

[wekiweko]

how about towed sonar?

well if the towed sonar have the same depth range as the bow or hull mounted sonar then the issue is still the same right?

 

[wekiweko]

oh and while we are on the topic of submarine rescue, personally, I would prefer us to do RnD on DSRV rather than midget subs. At least the role and benefit are much clearer

 

[Umigami]

FYI for all
It seems some Indon medias blatantly copy paste what we discuss here without giving the slightest credit to whoever the author here. They merely translating it using machine translation.

To the journalist in question : mas, saya paham Anda kerja dikejar target artikel harian. Tapi kalau Anda main copas mentah2x apa yang kami diskusikan minimal kasih acknowledgment credit buat para forumer disini khususnya si penuliasnya. Jangan cuma jadi silent reader disini trus kau copas mentah2x. Brengsek kau kalau mainmu gitu

Who?
Give us the link

 

[NEKO]

whoaa jay hind!
probably 6 to 7 days to arrive

Good bisa buat backup.

if the wreck lies below the effective range of sonar of those vessels on the surface then what is the point? you need to send a DSRV and look for it.

Yes, if the boat already located then send DSRV but if we are still in the searching phase then better to use side-scan sonar. Side-scan sonar is looks like a torpedo and towed by the host ship, so the operating depth can be adjusted.

That's how ocean infinity able to found Argentine sunken sub (depth : about 800 m), even the ship can map southern indian ocean in the seach of MH370 (depth: few km).

Effective range? Ulur kabelnya biar bisa lebih dalem.

 

[NEKO]

oh and while we are on the topic of submarine rescue, personally, I would prefer us to do RnD on DSRV rather than midget subs. At least the role and benefit are much clearer

Technically risky and $ risky.
Suddenly developing DSRV for very deep operation and after spending lots of money probably would only purchase 1 or 2, and I dont think it will success on international market.