This is a rare case where we have two first hand accounts,
and there are some significant differences.
Robertson's account claims there was two failures.
First, the big seawater inlet line failed.
Secondly, the main seavalve that could have isolated this line failed.
This valve is normally only closed when the condenser has to be inspected,
which in some ships may not happen for two or more years.
When something is used this infrequently and not tested,
things go wrong.
Mr. Brown claims the failure was outboard of the valve.
in which case closing the valve would have made no difference.
It is still quite possible that the crew attempted to close
the valve as Robertson claimed,
perhaps because they were not yet sure where the failure was.
Mr. Brown is clearly right about the cargo.
A 42,514 dwt ship could not be loaded to 50,000 tons,
so until new info appears we are accepting his version.
All tankers should be designed so that an ER
can be flooded with the ship loaded without the ship sinking.
This is expensive to do in a single screw ship,
but is almost automatic in a twin screw, two engine room ship.