That's not so much a compartment as it is a place to hang an anchor. It has a groove that runs fore and aft to match the groove in the after section where the windlass switch is. You can then hang a Fortress type anchor in the grooves. I didn't have room for an anchor in the locker, though, since I had 100' of chain and 100' of nylon rode in there. I kept my Fortress under the cockpit seat, and the Supreme on the bowsprit.Tom, what's the compartment in the forward section of the anchor locker? I don't have that.