Meanings of International Maritime Signal Flags
Pictures of signal flags, answering and numeric pennants - and their meaning explained.
http://www.anbg.gov.au/flags/signal-meaning.html
http://www.anbg.gov.au/flags/signal-meaning.html
Related sites:
http://www.anbg.gov.au/flags/signal-meaning.html
http://www.ared.com/kora/java/pcc/javaani.html
http://www.marad.dot.gov/publications/glossary/glossary.html
http://www.maritimesecurity.com/