This killer casualty happened a four days after the Torrey Canyon.
It says something about the Tromedy's priorities
that the Torrey Canyon in which 1 person died during the failed
clean up effort dominated tanker regulation for ten years,
while casualties like the Circe in which 38 people were killed
This was in the pre-IG days.
It is likely that, if the ship had been inerted,
she and her crew would have survived.
It is also possible the ladder was not properly secured.
Crews tend to get a little sloppy
when faced with such a short and normally easy leg.