I Am A Goddess.

“This is Lola. She likes cheese.”

Rick Grimes in The Ones Who Live 1x01 - Years

as in, a loooooooooong piece of steel cable with the sail at the end of it

of course it's ~basically a sailing ship~ but you can't stick masts on a container ship, that is a disaster waiting to happen for so many reasons

you'd only really get one point to anchor the mast, and that is right where it meets the deck, the containers get it the way of any ropes you might wish to use further up

you'd have to build entirely new container ships or some sort of ... mast container frame to account for the fact that the ships are built to exactly fit the containers, and sticking a mast in the middle of it will mess with that entire system by not being the size of a container

loading and unloading around the masts is going to be hell for the crane drivers and there will be damage to everything given the speed they usually work with, so every harbor will hate you if their cranes even have the height to work around the masts

and if you still decide to stick masts on a container ship, they won't be easily and quickly removeable, so you have to recertify and reclassify the entire ship, and it's going to take ages and ages to do properly, and they'll have to figure out how to do it so it's either expensive as fuck or they may refuse entirely. a steel cable on a winch is by definition removeable (that is, uh, uprollable?) so you don't have to deal with any of this nonsense. hell, if you calculate the pre-determined breaking point properly, it'll even fail safely

this isn't ~ooooooooooh we invented sails! we're the smartest~