Not good. From what you said, it appears to me that whoever installed
the jib track mistakenly lined up a hole in the track with the
bulkhead and drilled a hole and screwed a screw into the bulkhead.
This means that water may leak around the screw and into the
bulkhead. Dry rot in the bulkhead is bad news. I would remove the
screw and fill the hole with epoxy. And, if need be, drill another
hole in the track and the deck adjacent to the bulkhead. All the
bolts for the track should be screwed into barrel nuts and washers
under the deck, not into the bulkhead.
Also, it's prudent to remove the tracks, drill new holes over-size,
remove a bit of balsa core around the holes with a small screw driver
and fill them with epoxy and filler. Then re-drill the holes for the
bolts. This will help prevent water from leaking into the balsa core
and eventually causing dry rot and a nasty repair job. See the
article on how to do this in the Articles section of this website.