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speed test over a set distance. This is done, for example, for ships built on the Firth of Clyde, in Scotland (Sinclair, 2000). The late James A W Deacon, Superintendent of Lights in the Hong Kong Government Marine Department, told me they tried unsuccessfully to find a place for timing ships over a measured sea mile on the south side of Hong Kong Island. Eventually such a "course" was, it is understood, set up at Tseung Kwan O (Junk Bay), in the eastern New Territories. It seems unlikely that the two Obelisks at Tai Tam were ever used for timing ships because of their rather 'tucked away' positions. There is also no evidence of there ever having been a second pair of beacons in the vicinity.
Are there other possible uses for the two Tai Tam Obelisks? I was informed firstly in the late 1970s by a master mariner and senior civil servant in the Government Marine Department, that a Royal Navy Officer, who had served in Hong Kong before World War Two, had told him that the two Obelisks had been used when submarines submerged during tests. This practice came into being (so it was said) because of the loss of HM Submarine Thetis, on 1 June 1939, on its maiden dive with the loss of 99 sailors and civilians. A diver who went down to try to effect a rescue was also lost. Only four occupants managed to escape from the submarine using the Davis Escape Apparatus. The Royal Navy Officer told the senior Marine Department Officer that submarines were sent to Tai Tam Bay, after repairs or refits in the old Royal Naval Dockyard. At Tai Tam they could dive to periscope depth, in line between the two Obelisks. Then, if anything were to go wrong, the submarine could be traced and the crew rescued hopefully relatively quickly. The now retired Marine Department member of staff acknowledges that he never had material in writing to support this statement but he believes the information was given to him in good faith.
When this information was put to Guy Clarabutt, who served in Royal Navy submarines in Hong Kong before World War Two, he said he had never heard of such a practice (Sinclair, 2000). Neither could he remember the two Obelisks at Tai Tam (Waters, 2000). I spoke to a young British naval officer stationed at HMS Tamar, on Hong Kong Island, in 1995. He felt that such a practice was highly unlikely. In 1997, however, I raised the same question with Commodore PJ Melson CBE, Chief of Staff and Deputy to Commander British Forces. He, as
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speed test over a set distance. This is donc, for example, for ships built on the Firth of Clyde, in Scotland (Sinclair, 2000). The late James A W Deacon. Superintendent of Lights in the Hong Kong Government Marine Department, told me they tried unsuccessfully to find a place for timing ships over a measured sea mile on the south side of Hong Kong Island. Eventually such a "course" was, it is understood, set up at Tseung Kwan O (Junk Bay), in the eastern New Territories. It seems unlikely that the two Obelisks at Tai Tam were ever used for timing ships because of their rather 'tucked away' positions. There is also no evidence of there ever having been a second pair of beacons in the vicinity.
Are there other possible uses for the two Tai Tam Obelisks? I was informed firstly in the late 1970s by a master mariner and senior civil servant in the Government Marine Department, that a Royal Navy Officer, who had served in Hong Kong before World War Two, had told him that the two Obelisks had been used when submarines submerged during tests. This practice came into being (so it was said) because of the loss of HM Submarine Thetis, on 1 June 1939, on its maiden dive with the loss of 99 sailors and civilians. A diver who went down to try to effect a rescue was also lost. Only four occupants managed to escape from the submarine using the Davis Escape Apparatus. The Royal Navy Officer told the senior Marine Department Officer that submarines were sent to Tai Tam Bay, after repairs or refits in the old Royal Naval Dockyard. At Tai Tam they could dive to periscope depth, in line between the two Obelisks. Then, if anything were to go wrong, the submarine could be traced and the crew rescued hopefully relatively quickly. The now retired Marine Department member of staff acknowledges that he never had material in writing to support this statement but he believes the information was given to him in good faith.
When this information was put to Guy Clarabutt, who served in Royal Navy submarines in Hong Kong before World War Two, he said he had never heard of such a practice (Sinclair, 2000). Neither could he remember the two Obelisks at Tai Tam (Waters, 2000). I spoke to a young
British naval officer stationed at HMS Tamar, on Hong Kong Island, in 1995. He felt that such a practice was highly unlikely. In 1997, however, I raised the same question with Commodore PJ Melson CBE, Chief of Staff and Deputy to Commander British Forces. He, as
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