International Code of Signals, 2005 Edition IMO IB994E Revised Edition 2022
This edition of the Code incorporates all amendments adopted by the Maritime Safety Committee up to 2000. The Code is intended for communications between ships, aircraft and authorities ashore during situations related essentially to the safety of navigation and persons; it is especially useful when language difficulties arise. The Code is suitable for transmission by all means of communication, including radiotelephony and radiotelegraphy
Since its first edition, published in 1965, amendments to the Code have been adopted by the Maritime Safety Committee of the International Maritime Organization (IMO) resulting in four subsequent editions. The fourth edition of the Code (2005 edition) incorporated all amendments up to MSC 73 in December 2000. The *International Code of Signals* has not been amended since its fourth edition and this current edition comprises only minor editorial improvements and a new cover. Therefore, both the 2005 edition and this edition of the Code are considered equally valid.