In other news...
Indonesian navy checking on submarine after failure to report back from exercise
Indonesia’s military says a navy submarine is missing near the resort island of Bali with 53 people on board. Military chief Hadi Tjahjanto says the KRI Nanggala 402 was participating in a training exercise when it missed a scheduled reporting call.
https://twitter.com/AP/status/1384833897293307906
Boat specs
https://en.wikipedia.org/wiki/KRI_Nanggala_(402)
40 years old and in water up to 2300 feet does not bode well.