This is a set of 16 photographs taken during 4th Field Survey Squadron’s deployment on Operation ARIGHT 91 in Queensland from the 8th of July to the 5th of September 1991. The area of operations was the top end of the Cape York Peninsula, islands of the Torres Strait and the southern coast of PNG. Field parties utilised Texas Instruments TI4100 Global Positioning System receivers. Concurrent with GPS operations Doppler point positioning observations were carried out by field parties using Magnavox MX 1502 receivers on six of the control points. Two Bell UH-1H Iroquois helicopters from RAAF’s 171 COMD and Liaison Squadron were primarily used to deploy GPS field parties. Identification photography of control points was taken by air camera operators in AAAvn Pilatus Porter aircraft from 173 Gen Spt Sqn fitted with an RC10 aerial camera.This is a set of 16 photographs taken in 1991 during 4th Field Survey Squadron’s deployment on Operation ARIGHT in Queensland. The colour photographs are on 35mm negative film and are part of the Army Survey Regiment’s Collection. The photographs were scanned at 96 dpi. .1) to .3) - Photo, colour, 1991. Area of Operations (AO) coordination maps. .4) - Photo, colour, 1991. GPS acquisition post-processing. L to R: LT Simon Buckpitt, SSGT Steve Winner, WO2 Ken Talbot-Smith. .5) to .6) - Photo, colour, 1991. Base camp unidentified personnel. .7) - Photo, colour, 1991. L to R: OPS WO - WO2 Ken Talbot-Smith, DET SSM WO1 Stevo Hinic. .8) - Photo, colour, 1991. Base camp unidentified personnel. .9) - Photo, colour, 1991. Base camp L to R: unidentified (x2), OPS WO - WO2 Ken Talbot-Smith. .10) - Photo, colour, 1991. Base camp unidentified soldier. .11) - Photo, colour, 1991. Base camp L to R: CPL Andy Love, unidentified, SGT Steve McGuiness. .12) - Photo, colour, 1991. Base camp at Horn Island Army Compound. .13 to .16) - Photo, colour, 1991. Unknown locations in Area of Operations..1P to .16P – There are no personnel identified. ‘1991 OP ARIGHT’ annotated on negative sleeve.royal australian survey corps, rasvy, 4 fd svy sqn, op aright 91

The navigational computer was a circular slide rule used for calculating height and air speed corrections when flying an aircraft. The front cover lifts to reveal a further calculator used to solve vector triangles and plot course alterations. The device was intended to be strapped to a pilot's leg. The instrument was made by White and Gillespie (Melbourne) Pty Ltd c 1940 for the RAAF and used during WW2.Black metal box with silver metal flap top cover affixed with rotating circular rule . Two adjustable belts are affixed to the base of black box. A small spiral bound note book is contained beneath the flap top. RAAF Computer Navigational system MK. III. D. Serial No WG 2833navigation, raaf, computer, aircraft, ww2, 1940