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 A Royal Canadian Navy Historical Project 
 They made the Ultimate Sacrifice 
 
 
 MOORE, Robert John, AB, 7085-H, RCN, MPK - 21 Jul 1951, HMCS SIOUX - Son of Herbert John and Mary Elizabeth Moore of Dartmouth, NS; brother of William Henry, and Victor Alexander and Mildred Constance. 
 The 1951 Canadian Pacific Douglas DC-4 disappearance occurred on 21 July when a Douglas DC-4 four-engined piston airliner registered CF-CPC of Canadian Pacific Air Lines disappeared on a scheduled flight for the United Nations from Vancouver, Canada, to Tokyo, Japan. Neither the aircraft nor the 31 passengers and six crew have been found 
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