Yep, Roland, she was safely moored...but I would say, unfortunately, in Antwerpen/with such quantities of bunker, oil, fresh'n ballast water, etc. liquids / filled cargo areas-holds / state of remaining stability.
pls do not misinterpretate me again- these are just reasons, due to which the vessel could capsize:
- reaching the hub(Antwerpen), they also planning bunkering for entire loop, i.e. not very much of bunkers were left. ex. Cougar Ace - ran on nearly vapours of hfo, little miscalculation during bw exchange before USA, and she rolled over!
- loading and discharging sequence/order vs. ballasting/deballasting.
- she has cargo gear as well - booming out could have caused some additional list.
Among above statements could be the answer to cause of this accident...or could not.
rgds
roostes