Portland Navigation Triangle 230mm Blundell Harling ge Locations within this MapBowen Bells Locations within this MapBowen Bells Waterhole Calton Hill Dalrymple Point Datum Rock Port Denison Doughty Creek Flagstaff Hill Herbert Kings Beach McCanes Bay Mullers Lagoon North Entrance North Head Pring Shoalwater Bay Sinclair Head South Entrance South Head Stone Island Wentworth Rocks Yumbabullo Bowen Hill Town Hill Saltwater Creek Shoal Water Bay Gordon Creek Port of Bowen Locations within this MapBeatrice May Bluff Breaden Bluff Bullock Bore Calanchini Creek Calanchini Hills Calcali Rockhole Desert Bore Dibbin Rockhole Empress Spring Ernest Giles Range Holroyd Bluff Ida Range Kyffin Thomas Hill Lake Bedford Lake Wells Larry Wells Range Lyell Brown Bluff Malantila Rockhole Mount Dora Mount Elisabeth Mount Lancelot Mount Laurie Mount Smith Mulga Bore Mundah Cone Nora Welstead Creek Packhorse Bore Parsons Bluff Peterswald Hill Pikalu Rockholes Point Katherine Point Robert Potter Bluff Red Hill Red Hill Bore Square Hill Tharkeedah Toonil Spring Von Treuer Tableland Well Spring Welstead Hill Welstead Range Wharton Bore Namingoola Coonooroo Holyroyd Bluff Scale in millimetres Can be used in pairs as a Parallel Rule