United Kingdom mapping agencies and units on operations 1992 – support to ADF elements of UN peacekeeping force in Western Sahara 1993 – support to ADF elements of UN peacekeeping force in Somalia 1993 – Corps soldiers posted to UN Transitional Authority in Cambodia 1995 – Corps officers posted to UN Protection Force Headquarters in Bosnia-Herzegovina Defence international cooperation Commencing in 1954, the Corps was again involved in surveys and mapping the New Guinea area, initially in cooperation with the United States Army Map Service for two years, and again as solely an Australian force from the early 1960s. The 1956 survey (Project Cutlass) of ship-to-shore triangulation included a 300-kilometre theodolite and chain traverse on New Ireland. From 1962 the Corps resumed geodetic surveys as part of the National Geodetic Survey, linking to the global US HIRAN survey and the high order Division of National Mapping traverse and triangulation through the PNG highlands. There was a continuous Survey Corps presence in Papua New Guinea (PNG) from 1971 to 1995, with 8th Field Survey Squadron raised in PNG and based at Popondetta, Wewak and Port Moresby for geodetic surveys, topographic surveys, map compilation, field completion of compiled maps, to support the Papua New Guinea Defence Force and to provide advice to PNG National Mapping Bureau. During this period the Corps completed the national/defence mapping programme of scale 1:100,000 topographic maps covering the entire country, the derived 1:250,000 Joint Operations Graphic – Ground and Air charts, large scale military city orthophotomaps and participated with the Royal Australian Navy in beach surveys of most of the coastline. In the 1970s up to 60% of the Corps' capability was engaged on PNG surveys and mapping. This mapping programme was based on high altitude (40,000 feet) air photography, acquired by the Royal Australian Air Force using Canberra bombers fitted with Wild RC10 mapping cameras (Operation Skai Piksa), supported by Survey Corps surveyors and photogrammetrists to plan the photography requirements and for quality control to ensure that the photography met the high technical standards for the subsequent mapping processes. Under the Defence Cooperation Programme, the Corps completed many cooperative and collaborative projects with nations in Australia's area of strategic interest. These projects included ground surveys, definition of geodetic datums, air photography, assistance with definition of exclusive economic zones, mapping, provision of equipment and technology transfer and training of officers and technicians. Projects commenced in 1970 in