Portland Navigation Protraction 250mm Blundell Harling 150000 Locations within this Map16 Mile Locations within this Map16 Mile Well 2 Mile Well 3 Mile Well 4 Mile Bore 4 Mile Well Aerodrome Well Arabella Hill Balchara Pool Balchara Well Barkatangee Pool Barkatangee Well Barlathun Hill Barlathun Well Bobs Well Buchanan Well Camel Paddock Well Cave Well Centipede Well Claypan Well Cork Tree Well Corner Bore Corner Well Cronk Well Crow Plain Well Cunuloo Pool Cunuloo Well Dunns Well Eadey Well Garden Well Gaston Well Geebera Pool Geebera Well Grass Flat Well Holding Well Hooley Well Horse Works Bore House Bore House Well Ironstone Well Jaminu Pool Jaminu Well Johnston Well K Tree Pool K Tree Well Koordarrie Lockes Well Mount Mary Mount Mistake Mount Well Nanjano Well Nanyarra Well Nanyingee Bore Nanyingee Hill Narneeyarra Claypan No Locations within this MapGurundu Arnhem Bay Baralminar River Barrkira Barrkira Landing Ground Burungbirinung River Cape Newbald Cato River Cliffy Point Dhalinybuy Dhalinybuy Landing Ground Everett Island Flinders Point Ganumbali Island Garadandanboi Bay Garalja Island Gikal Gobalpa River Godijboi Point Gonguruwuy Goromuru River Gwakura Island Hardy Island Inglis Island Jandapa Hill Low Island Maiyayigur Point Mallison Island Mata Mata Mata Mata Landing Ground Mudhamul Nalwarung Strait Nyinyiwoi Island Pera Channel Peter John River Probable Island Raymangirr Rekala Island Rhodes Point Rippling Shoal Rorruwuy Rorruwuy Landing Ground Yalliquin Yalliquin Landing Ground Yinyikay Yinyikay Landing Ground Nalwarung Straights Urokona Godjiboi Point Longoidya Low Islet Paperbark Swamp Douglas type square pattern navigational protractor Can also be used as a simple parallel rule and plotter