Not clear why ship would stay on SBM with hose connected
after completing discharge.
Cahill account makes more sense here.
Later found a Hawaian source which quotes
the On-Scene Coordinator as saying:
"we were all fortunate that the T/V Exxon Houston
did not lose the remaining 90,000 barrels of crude oil
and 2000 barrels of Bunher C."
Clearly the ship was still discharging.
This SBM is in a very exposed location 1.5 miles off shore.
Incredibly, the Courts found Exxon and the Master solely
to blame for the spill on the grounds that the navigation
error was the more proximate cause.