Not sure how much weight to give the black out report,
but 90 tons of BFO and 8 tons of MDO is a ridiculously small amount of bunkers
for a ship this size.
Even if she could actually pump the dregs of the bunker tanks,
she would have barely made it to Singapore.
A portion of the fuel in the bottom of the tanks is simply not pumpable.
It is quite possible th California simply ran out of fuel.
What we do know is the Russian Registry suspended Class in August 2005
and withdrew Class on 2006-02-02.
She apparently was without Class when she loaded in India.
How this is possible we don't know.
We also know that in her last PSC inspection in Gibraltar, 2005-05-17,
she was detained for 6 days with 20 deficiencies, many of them major.
And 2006-10-05 also in Gibraltar she was fined for a small oil spill
due to a crack from a bunker tank to a ballast tank.
GISIS has no cause info.
CTX's guess is that the report of a black out may well be correct.
In any case, if the ship had been twin screw (twin engine rooms)
she almost certainly would not have sunk.