Nothing in a modern ship. All the ones available in large scale are very old designs. However, one good thing about very modern, very large cargo ships is that they are relatively easy to scratchbuild. They are so large that seakeeping ability is sacrificed for larger cargo holding and cheapness of building (eliminate compound curves). Thus, there is virtually no sheer to the deck, the cross section is almost a rectangle, and the shapes of the bow and stern are quite simple. Thus, using the bread and butter laminating method, they are pretty simple to build. Plus, the deck structure, again to cut costs are basically simple rectangular prisms. BTW, the Revell Colombo Express is 1:700, not 1:350, giving you some idea of how large these things are.
Also, in 1:192, which would make a big, big model, for the scratchbuilder there are generic PE railings and ladders available. Portholes in deckhouses can be represented by drilling a hole, a daub of black paint in the hole, and glazing with microglaze. No fancy fitting needed. Rectangular windows can be black decals.