http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
as adopted by the fourth Assembly of the Inter-governmental Maritime Consultative Organization in 1965, for visual, sound, and radio communications
International code of signals for visual, sound, and radio communications
Intergovernmental Maritime Consultative Organization
National Geospatial-Intelligence Agency.
United States edition, 1969 (rev. 2020).
iii, 158 pages : illustrations (some color) ; 28 cm.
"Pub. 102, the 1969 edition of the International code of signals, became effective on 1 April 1969, and at that time superseded H.O. Pubs. 103 and 104, International code of signals, Volumes I and II"--Preface.
"Revised and Updated through Notice to Mariners 47/20 (21 November 2020)"