This type of instrument typically used by pilots and navigators for quick calculations of Air Speed and Wind Drift.hand operated navigation computer. Rotating scale on the front panel and a scroll type scale on the inner panel with a winder knob on the right side. Front panel is hinged at the top and bottom has two curved thigh pads.Indent No. G6B/145 RAAF Serial No. WG/2967* I.C.A.N. in center of front dial COMPUTER NAVIGATIONAL Ml. III D.

Lithography is a method of printing, originally based on the immiscibility of oil and water. The printing is from a stone or a metal plate with a smooth surface. It was invented in 1796 by the German author and actor Alois Senefelder and was initially used for musical scores and maps. There were two sailing ships with the name Helen B Sterling a six masted vessel and an earlier four masted Helen B Stirling that is the subject of the lithograph depicting the rescue of the crew and passengers by the Australian light Cruiser Melbourne in a gale off three Kings islands 55 kilometres Northwest of Cape Reinga New Zealand. This Helen B Sterling was built as a four mast wooden auxiliary screw Schooner, known as a wind jammer of 1608 tons. The vessel was formally known as the “Tacoma” and owned by the Washington Shipping Corporation based in Seattle USA in 1917. This original Helen B Sterling was caught in this storm and eventually sunk after being abandoned by the crew. The second generation relatives of those who were passengers at the time of the foundering advise that the storm was more like a cyclone. The Zeehan and Dundas Herald reported on January 26th 1922 that the abandoned vessel was still afloat and drifting towards the New Zealand coast. The Kalgoorie Miner newspaper also had an article reporting that on the 7th Feb 1922 the crew, captain, first mate and their families after being heroically rescued by the crew of the Australian light Cruiser Melbourne were arriving in Sydney today aboard the steamer the “Maheno” from New Zealand.Lithograph appears to be by an unknown artist A M Duffield produced in 1924. It is significant in that it depicts the rescuing of the passengers and crew of the schooner “Helen B Stirling”. At the time this was a significant event that made most Australian and New Zealand papers because of the involvement of the Australian cruiser “Melbourne”.Lithograph framed of cruiser Melbourne rescuing crew from Helen B Stirling off New Zealand coast. By A.M. Duffield."Australian Cruiser Melbourne Rescuing crew of (undetermined text _ _) Schooner Helen B Sterling of (Halifax Nth Canada Tons 1343 in a gale in the Pacific Ocean" (this last potion of text is incorrect see note sec this document) Lithograph signed bottom right hand corner in black "A M Duffield Nov 19th 1924"warrnambool, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, lithograph, a.m.duffield., helen b stirling, schooner, cape reinga new zealand, alois senefelder, cruiser melbourne, three kings islands

She was nearing the end of her voyage, close inshore off Cape Otway at Curdies Inlet (now called Schomberg Reef), east of Peterborough and 150 miles westward of Melbourne. When the wind suddenly dropped the ship drifted onto an uncharted reef and became stuck fast. There was no loss of life ans all the passengers, crew and mails were taken off by a passing coastal steamer, the Queen, out of Port Fairy the following morning. The passengers' luggage and some of the cargo was rescued, but the weather worsened and work was abandoned and cargo littered the beach. The wreck was sold for salvage to local merchants: two were drowned in attempts to reach her. It became a popular wreck site for diving and over 100 relics have been handed in. The bell of the ship is in the Warrnambool Museum, southern Victoria. Relics at Flagstaff Hill Maritime Museum include a cannon, a communion set, a brass candlestick, and a diamond ring.A diamond shaped brass belt decorationschomberg, salvage, peterborough