I agree that this is simply negligence. I like this graphic from the BBC because it inadvertently displays the different ways the vessels were navigated:
Let’s assume the data comes from AIS, and so is accurate. Look at the meandering track of the Stena vessel before she anchors. Presumably maneuvering around other vessels. Maybe evaluating possible spots to drop anchor before doing so. A lot of thinking going on in the bridge.
Now compare Solong’s track. Straight arrow. No deviation for traffic at all, even though Stena’s track shows the normal course changes of a ship in traffic.
There is of course some conspiracy theory about the collision being intentional. But if it was the Solong would have still had to make the normal course changes for traffic etc. that is apparent in the Stena’s track, even on a kamikaze run. But there are no course changes.
Both are operating in the same environment. The Stena showed active navigation along her track. The Solong shows a vessel following a magenta line.
Now, Solong’s track on the BBC graphic could simply be an approximation of more complex conning through dense fog. But there was dense fog. Zero visibility. So why is the Solong traveling at 16 knots right into a recognized anchorage for vessels?
That alone is gross negligence, and if the Solong’s captain was negligent of that, it’s not a leap to guess he was negligent over the vessel’s course, or, more exactly , on his oversight of his OOWs.
These types of howling mistakes occur frequently. In my neck of the woods the exemplar is the Queen of the North grounding in BC. That ferry also had a straight as an arrow track line before grounding. The difference was no fog. All that occurred is that the OOW got complacent. Got involved in a conversation with the watch (2 ABs). And forgot to make a turn. All the players were highly experienced. Every bit of nav gear known to man was glowing in the wheelhouse. And yet a little distraction was all it took to sink a ship.
And mind you the QOTN was operating in one of the most difficult places to navigate in the world, the BC Inside Passage. Orders of magnitude more difficult than where the Solong was steaming.
So, it’s not difficult to figure simple, ripe negligence was going on in Solong’s bridge. Either no one looking at the radar, or ignorant in interpreting the display, or both. High rate of speed into a known anchorage in dense fog with no course changes. All simple negligence, within the bounds of normal human stupidity.