While on a ballast passage from port Walcott to Singapore,
the hull of the 76,123 dwt Japanese motor tanker, Choyo Maru,
suddenly broke apart in the amidship area when about 17 miles north of Bali Island
in lat 07.45S, long 115.09E on December 21, 1979.
There was no explosion.
The crew after abandoning ship was safely picked up by an Indonesian vessel.
Without completely breaking in two,
the Choyo Maru drifted with the current for nine days
until sinking in lat 09.00S, long 115.46E on December 30.