Published on: Thursday, April 29, 2021 By: Tempo Indonesia Wreckage from the missing Indonesian navy submarine KRI Nanggala on the seabed near Bali. JAKARTA: Indonesian Navy Chief of Staff assistant Rear Admiral Muhammad Ali said that nature may have had a role in the sinking of the naval submarine KRI Nanggala 402 and mentioned underwater currents as a possible cause of the tragedy. He asserted that underwater currents are extremely influential in a naval submarine’s submerging procedure which is why Navy submarine crewmen always follow established guidelines prior to a mission. “There are what are called internal solitary waves that according to oceanographers are strong underwater vertical currents [that causes submarines to sink] at a faster rate than normal. This must be watched for,” said the navy officer.