The chain is much heavier and does most of the work. I used to be really addicted to Deadliest Catch and there was an episode in season 4 or 5 I think where a really nasty storm was hitting the crab grounds and Cpt Hansen gave the camera a bit a tutorial on anchors. He took the ship into a bay where it would be in the lee or a mountain on an island and dropped anchor. And he talked about how the chain is actually the important part, and all it was really going to do was reduce their storm drift. But even then, with a much smaller ship and therefore a much more favorable anchor and chain to ship weight ratio he didn’t expect the anchor to make the ship not move, just not more FAR (mostly to keep the back end of the storm from pushing them into the island).
You really can’t use anchors to stop, especially not when the ship gets this big. There’s a reason big ships get the right of way, changing anything about their movement is so hard. 100,000 tons is a lot of momentum. Nothing relying entirely on drag is stopping that quickly. You need to push backwards.
The ship was still in the harbor which should be a controlled area. Until it cleared that bridge it should have had escort tugs which serve to guarantee it stays in the deep channel. As soon as the ship started turning right one of those bigaxx tugs should have been on it. And they are powerful enough to keep it straight.
Looks to me like another case of working on the cheap.
Remember the Evergiven ship that hit an island just south of here, close to the Naval Academy, awhile back? It had left its escort behind and wandered out of the channel. Lot of dumbassness involved.