Only in Cedre and USCG databases.
Must have been a pretty massive hull failure,
if they could not cover it up.
This ship is a Kockums 350, one of the most lightly built class of ships
built in the mid-late 1970's.
Some 13 of these ships were built between 1975 and 1979.
They experienced a wide range of continuing structural problems.
These 350,000 dwt ton ships had a lightweight (basically steel weight) of about 43,000 tons.
A minimal lightweight for a single hull ship of this size would be at least 47,000 tons.
The good Japanese ships of this size and era had a lightweight of over 50,000 tons.