Michael Jeffery AC CVO MC Governor-General of the Commonwealth of Australia, unveiled a plaque at the Australian War Memorial to commemorate Royal Australian Survey Corps units which served in war. In his address the Governor-General praised the efforts of all personnel of the Corps over its 81 years of service to the nation in both war and peace. On the occasion of the 75th Anniversary of the Corps in 1990, the Survey Corps' contribution to the effectiveness of the ADF was acknowledged in a Notice of Motion from the Senate of the Australian Parliament. Moved by Senator MacGibbon on 31 May 1990, the Notice states: "I give notice that, on the next day of sitting, I shall move: That the Senate – (a) notes that 1 July 1990 marks the 75th anniversary of the foundation of the Royal Australian Survey Corps which produces maps and aeronautical charts required by Australia's defence forces; (b) notes that from the time of the explorer Sir Thomas Mitchell, Surveyor General NSW, who as a Lieutenant on Wellington's staff served as a surveyor in the Peninsular War, military surveying has played a vital role in the mapping of and development of Australia; (c) acknowledges the Corps' contribution to the knowledge of Australia's geography, topography and environment; (d) notes that the Royal Australian Survey Corps with its high level of professionalism, has served Australia well in war and in peace; (e) acknowledges the valuable mapping service rendered to New Guinea, Indonesia and the south west Pacific by the Survey Corps as part of Australia's overseas aid program; and (f) congratulates the Royal Australian Survey Corps on its meritorious achievements through the 75 years of existence." Also on the 75th anniversary, Australia Post issued a commemorative first day issue prestamped envelope of the Royal Australian Survey Corps. In his official history of the Royal Australian Survey Corps as part of the Australian Army History Series, the much published author and highly regarded military historian, Chris D. Coulthard-Clark, concluded that "Australians as a whole might still be blissfully unaware and hence unappreciative of the debt of gratitude owed to the generations of surveyors who have helped make possible the enviable standard of living generally enjoyed today across the country. Should that situation ever change, and the story receive the wider recognition that it deserves, then the part within that tale occupied by military mapmakers is worthy of special