The International Naval Research Organization is a non-profit organization dedicated to the encouragement of the study of naval vessels and their histories, principally in the era of iron and steel warships (about 1860 to date). Its purpose is to provide information and a means of contact for those interested in warships. The principal activity of INRO for over 50 years has been the publication of a quarterly journal, Warship International, recognized internationally as the leading and most authoritative publication in the field.