This looks like it might be a roll-on/roll-off cargo ship, which have covers like that. But at the speeds a ship travels aerodynamic drag is minimal so you’re right about that.
And those sails will make going under bridges pretty hairy unless they can be stowed somehow.
The sails in the render look segmented into 4 separate parts that are nested in one another, so I imagine they can retract into themselves from the looks of it.
This looks like it might be a roll-on/roll-off cargo ship, which have covers like that. But at the speeds a ship travels aerodynamic drag is minimal so you’re right about that.
And those sails will make going under bridges pretty hairy unless they can be stowed somehow.
They’re telescoping so they can retract them for bridges or inclement weather.
Looking at their website, it looks like the wings fold in half and then lay down.
The sails in the render look segmented into 4 separate parts that are nested in one another, so I imagine they can retract into themselves from the looks of it.
Edit: Yep
Ah, okay. Like an upside down daggerboard.