If you find that you want to change how the locker drains, it's simple enough to do. You seal the bottom of the locker & then drill
overboard drain holes on both sides of the locker at the low point, & cover them with clam shell type vent covers.
Having a way to access the
rode from belowdecks is important so that you can knock down any chain castles that form, add a tie in point for the rode's bitter end, & access all of the fasteners for your bow
hardware from the underside. Including adding
backing plates, nuts & washers, etc.
You can make the access door vapor tight, or even watertight, but having access to that area of the boat is critical. Imagine if you need to
work on the
windlass, clean the locker, or add an extra pair of bow
cleats. That or to unsnarl the
rode, as it gets stuck at some point when you're dropping anchor.