Rear-Admiral George Stephen Ritchie CB DSC (30 October 1914 – 8 May 2012) was a British admiral noted for his cartographic and hydrographic work. Naval career Ritchie was born in Burnley, 1914, of Scottish parents, Sir Douglas Ritchie and Lady Margaret Stephen Ritchie. He was educated at the Royal Naval College, Dartmouth from the age of 13, from where he went to sea at the age of 17. In 1936 he joined the Surveying Service, being appointed to the old coal-burning surveying ship, , operating in the South China Sea. During the Second World War the then Lieutenant Ritchie was awarded the Distinguished Service Cross (DSC) for bravery whilst surveying beaches in North Africa behind the enemy lines. From that time he worked continuously in that branch of the Royal Navy travelling all over the World and commanding four of HM surveying Ships: on a world circling voyage with scientists on board; HMNZS Lachlan, the New Zealand survey ship; , in the Persian Gulf and in the West Indies and North Atlantic. In 1951 on the survey ship HMS Challenger, recorded the deepest part of the ocean trench depth Challenger Deep of 5,960 fathoms (10,900 m, 35,761 ft) using echo sounding. He was awarded the Royal Geographical Society's Back Award in 1954. In 1966 he was promoted to the rank of rear admiral and appointed to the post of Hydrographer of the Navy which he held for five years, responsible for the operations of the RN Surveying Squadron and the publication of the Admiralty Chart worldwide series. In the same year he received a Companion of the Bath. In 1967 he published The Admiralty Chart, a history of British Naval Hydrography in the Nineteenth Century Post naval career After 18 months as a senior research fellow at Southampton University, he was elected first in 1972 and again in 1977 as president of the International Hydrographic Bureau, thus spending 10 years in the Principality of Monaco, in the service of the then 50 Member States of the International Hydrographic Organization. Admiral Ritchie received the Founder's Medal of the Royal Geographical Society, the Gold Medal of the Royal Institute of Navigation (he was president from 1970 to 1972), the Silver Medal of the Royal Society of Arts and the Prix Manley-Bendall from the Academie de Marine. He was an honorary member of the Challenger Society for Marine Science and an Emeritus Member