Phil,<br />I managed to find this from Geoscience Australia web site..<br /><br />PRESTONS NSW LAT -33 56 LONG 150 52 <br /><br />Rickove-- I do not have my unit as yet but I am thinking of purchasing the unit described at this web site-- it is called the Extreme UCI-6400 model https://www.hotchip.com.au/OnlineStore/ProductDetail.asp?ProductID=117 will this be sufficient?