Helen sends a message to her husband when he sets out on the road on the submarine of NangGala, but has not received feedback before the missing ship.

Kri Nanggala submarine, carrying a 402 number, loss of communication in Indonesia's beach waters in the Northern Bali island when participating in April 21.

Helen, the wife of Selda Diyut, confirming her husband is one of the sailors on the submarine of Nanggala.

SERA DIYUT left the house to go to Surabaya around 20:00 Sunday and the couple still talked to each other through the WhatsApp messaging app until 22h night.

Helen holding the phone with her husband's photo is Serva DIYut Subandriyo (left) and his teammates on April 22.

On the morning of April 21, Helen texted her husband to tell him to eat breakfast, but the application indicates that the message has not been read.

Helen said that when preparing to go to the bus to the unit, Selda Diyut said he felt "something was wrong" before the upcoming outward trip.

"SERDA DIYUT once set out like that many times, but never when he felt so insecure," Helen said.

Another sailor was also on the Kri Nanggala submarine as Sdera Ede Pandu Yudha Kusuma, who had just been married for less than two months.

Yayak Dwi Ernawati held the wedding photo of the son-in-law and daughter.

"Just three days after marriage, it must return to the unit in Surabaya," she said.

The Indonesian Navy said Nanggala submarine could have a power outage while diving, causing the battleship to lose control and start sinking at 3 am April 21.

Kri Nanggala submarine position lost contact.

Rescue team on April 23 detects unknown objects with "high magnetic", floating at a depth of 50-100 m north of Bali island.

Indonesia owns a 5-piece submarine fleet, in which two cakra classes made by Germany are Nanggala and Kri Cakra, three other Nagapasa classes manufactured by Korea, Kri Nagapasa, Kri Ardadedali and Kri Alugoro.