This Efxinos, under the name Mare Princess was found to be leaking
from a hull crack at Providence, 1998-09-15.
May have been involved in a Cuban spill in 1993.
IMO says the Malta Maritime Authority investigation report
has been completed and received,
but of course it is confidential.
IMO one line summary confirms 4 dead and 2 hurt.
The vessel had just completed STS to Worldwide VLCC Sebu.
It is unclear whether the ships had already
unmoored at the time of the explosion.
One source says Sebu had left the area before explosion.
Another says Sebu suffered only minor damage.
Another mentions "fires aboard the two vessels."
There may have been contact forward during the unmooring.
This is the hottest part of the day
during the hottest part of the year in the PG.
If it were calm (not confirmed), ideal conditions for vapor build up.
World-wide says the cargo transfer had been completed two
The next step for Efxinos would have been the cargo survey.
They may have opened the ullage lids to do this.
If opening the ullage lids fo cargo survey was causal,
it should have been very important
to let other other tanker crew know what happened.
Tanker crews tend to be very casual about this
implicitly assuming since the tanks are inerted
the tank vapor cannot be in the combustible range.
But under the current regulatory system
such information is suppressed.