The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From VenuLex Solutions:
Official app for the National Civil War Naval Museum in Port Columbus, Georgia. Located in historic Columbus, Georgia on the Chattahoochee Intra-Coastal Waterway, Port Columbus is the only museum in the world dedicated to telling the complete Naval story of the American Civil War.From the ironclads to steam and sailing ships to the first successful submarines, Port Columbus has gone to great extent to raise, recover and preserve the military and technological advances of the American Civil War Navies.