This tender is for gravity data acquisition during the financial year 2012-2013 in northwest Tasmania to improve the regional coverage. The existing gravity coverage in this area contains a number of gaps. Access for data acquisition to infill these gaps will be by vehicle along public roads, on private property and by foot. On 2 wheel drive standard roads the station spacing will be nominally 1 kilometre while for poorer access a spacing of nominally 500 metres will be used.