A set of two decks of cards. The one with blue backs shows naval signal flags and morse code. The spades and hearts suits show the flags for the letters of the alphabet, and the clubs and diamonds suits show various other signal flags. The jokers show the flags for sending and receiving. The other deck with black backs shows semaphore and morse code. The spades and hearts suits show flag positions from the front for sending, and the clubs and diamonds suits show flag positions from the back for receiving. The jokers show flag positions from the front and back, respectively, for Attention! The backs are one way. Also included in the box are a booklet on ‘The History of Signaling’ (sic); a morse code bookmark; a poster of ‘Historic Development of the Phonetic Alphabet’; a poster of ‘International Nautical Signaling Flags’ (sic); two cardboard devices to practice morse code; two cardboard wheels showing signal flag positions with flags.