[linMcHlp]

The Dali, built by Hyundai Heavy Industries in South Korea, meeting the designs of the owner Oceanbulk Maritime SA and ocean transport service Maersk:

https://en.m.wikipedia.org/wiki/MV_Dali

was “a single screw.” I incorrectly assumed at least “twin screws” - 1 port side plus 1 starboard side.

A single screw boat / ship / vessel is prone to the propellor “walking” (known as paddlewheel effect or asymmetric blade thrust) - partcularly when the vessel is set to run in Reverse motion.

From the rear view: A right hand prop rotates clockwise when the vessel is set to run in Forward motion . . . and counter-clockwise when the vessel is set to run in Reverse motion.

In Reverse, the stern of the vessel “walks” to port - to the left.

So, in the crosswind of 8 knots from the east “working” on the very high and large “sail” of the vessel+containers ship heading southeast, and now including the prop “walking” the stern to port . . . the FSK Bridge support was in the way.

The ship has 1 stern rudder, plus 1 bow thruster.

When in forward motion (”under way”) and very heavy, but single screw in reverse, the rudder is initially not a significant contributor. The bow thruster also not much help - if it was working.

- - -

Dali sister ship: MV Cezanne:

https://www.vesselfinder.com/vessels/details/9697416

https://www.marinetraffic.com/en/photos/of/ships/shipid:5481513/shipname:CEZANNE?order=date_uploaded

See: https://www.marinetraffic.com/getPhoto/?photo_id=4950293&photo_size=800

MV Cezanne appears to have a single rudder. Ship, when light and high in the water - the single prop is more effective at performing the “prop walk” to port, when ship is in Reverse.

- - -

[9YearLurker]

You must not have realized it was actually built by Boeing.

[Seruzawa]

I never imagined that such ships would be single screw. But then I should have expected that these things would be built as cheaply as possible. It must be a cast iron bytch to dock these things.

[GOPJ]

A single screw boat / ship / vessel is prone to the propellor “walking” (known as paddlewheel effect or asymmetric blade thrust) - particularly when the vessel is set to run in Reverse motion.

So why was it so close to a support pillar in the first place? Other than that are you making the case this was all an accident caused by a sting of coincidences at exactly the wrong spot and exactly the wrong time?

[TangoLimaSierra]

Since they were not far from their departing port, I wonder if they called for tugs at first sign of trouble. Don’t know how long it would have taken them to reach the ship.