More than 50 metres below the Arafura Sea, north of Darwin, lies a submarine that was the first Japanese warship sunk by the Australian navy in World War II.
Now, the journey by archaeologists and divers to document the war grave where 80 Japanese crew died has been covered in a documentary.
In November 2022, a team of marine archaeologists and technical divers embarked on the first expedition down to the I-24 submarine to gather data and take images. 
“It’s one of the most significant shipwrecks in the Northern Territory (NT) and one of the significant wartime wrecks in Australia,” Heritage Branch NT officer David Steinberg said. …