» Code of Signals    International nautical/marine signal flags geographic.org.    http://www.geographic.org/flags/code_of_signals_flags.html

» International Signal Flags    Graphic word-to-signal converter.    http://www.sartori.com/nhc/flags/

» Maritime Signal Flags    Offers quiz of random phrases with English translations.    http://www.sideslip.org/flags/

» Nautical Flag Translator    Translate your initials into nautical signal flags.    http://www.wingood.com/flagselect.asp