If you rig the accommodation (aka boarding) ladder, you really ought rig at least one of the boat booms out.
Note that you could show the ship moored to a mooring buoy--these are about 10-12' across, and stand 3-4' out of the water--although, once fastened to the ship they tip about that whole height back toward the ship.
Which brings us to how mooring rodes work. You set out a rode at a minimum of 1:7. So, in a 100' of water depth, you'd have 700' of chain rode up out of the locker (the saltier measurements would be 16 fathoms of bottom depth and 117 fathoms of rode--really 8 fifteen-fathom shots of chain to the stopper on deck).
So, really, the chain hangs down at only a light angle until it curves in a lopsided catenary before laying along the seabed out to the anchor. (This is another plus for modeling a mooring buoy; they can ride to a short scope.)
Anyway, away from salty reality, and back to the semi-reality of ships on pedestals over wooden bases.
A person could take and solder or epoxy some stout chain (like 2x or 3x the ship's to scale; ergo, foredeck chain at 48 link per inch, use 20-26 lpi for the buoy). and stand that up from the base. perch a mooring buoy up top, and secure anchor chain through a hawse-pipe of the bull nose. All cool stuff, and eye-catching.
Now, the business of showing an anchor on the base comes--to my thinking at least--from sailing vessels with long bowsprits, and having a base long enough to 'protect' those spars a bit. I think those anchors look best with either a neat hole in the base for a fluke of the anchor to fit in loosely. But, it will emulate a "dug in" anchor neatly. Alternately, but a dowel in the base to hook a fluke around, since the stock is going to hold the shank up off the base.
That's my 2¢; others' differ.