Eastings and Northings? DEC have their own map grid system (COG System) and it is by far the fastest and most accurate system I have come accross, even better than that I used in the ADF. There is also GPS backup (sometimes two GPS). This is a great first job; it's well paid and you get to work with a good bunch of blokes. If you get to Manjimup you also inherit the pilot's bar (The Dog House)
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Flying the spotter circuits can get boring after a while, but the air attack supervision tasks can be exciting, particularly in a big season. You get lots of bush strip and extreme Xwind experience too. Greg is also a very fair man and a good CP. The aircraft are also maintained well. Lots of young women in the area to keep the pilots entertained too, just don't take them back with you...