Viral videos give a haunting glimpse of life aboard doomed Indonesian submarine KRI Nanggala 402

• As Indonesia mourns the sinking of the vessel with 53 sailors aboard, footage of the crew – along with photos and tweets shared by their loved ones – have captured the nation’s hearts
• In one video, petty officer Setyo Wawan warns wives to assume the worst; in another a toddler tries to stop his father from embarking on the doomed voyage