Civil War Naval Museum sails into uncharted waters  — Of all the
sounds at Columbus' National Civil War Naval Museum — cannon
fire, recorded ocean waves and narration — the one retiring
director Bruce Smith likes to talk about is the gasp.  It's the
gasp of visitors seeing the enormity of the CSS Jackson. The
burned hull is the museum's centerpiece; a metal frame outlines
how big the ironclad used to be.  "One of the great, fun things
that we have here is when people come in and they turn that
corner, and they go 'Aah,'" Smith said, mimicking the gasp. "We
can hear that drawing of breath as they walk in and see this
giant thing, and that's a really fun response."  And one he
won't be hearing come Dec. 31, his last day. As he retires to
Florida, he leaves a museum facing an uncertain future as the
city cuts its funding and it struggles to attract the visitors
it needs to buoy its revenue.  Smith will be remembered as the
man who took the museum from a concrete shed of rotting boat
hulls to an attraction worth