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On Saturday, October 15, Kachas "Kach" Derdiarian, a beloved husband, father, and grandfather, passed away at the age of 99. Kach was born in New York City and graduated from Stuyvesant High School. During World War II, he served as a flight engineer on a PB2Y Coronado in the US Navy Air Force from November 1942 to January 1946. He was part of Operation Lifeline in the South Pacific. Upon returning from the war, he married his lovely next-door neighbor, Kay, with whom he recently celebrated their 75th wedding anniversary on August 16. He graduated from the Academy of Aeronautics in 1946 and completed his engineering studies at Brooklyn Polytechnic Institute. He was a lifetime member in the American Society of Mechanical Engineers. He worked as an engineer for Pan American Airways in New York, Lockheed in California where he worked on the C130 and F104 Starfighter aircrafts, Loral Electronics in New York, Microwave Associates (MACOM) in Massachusetts, and finished his career at General Dynamics in Connecticut where he worked on Ohio and Los Angeles class submarines. One of his projects for the NASA space program was the lunar soil sampling system of the Surveyor spacecraft, which laid the groundwork for the Apollo program and is on exhibit at the Smithsonian Museum. He grew up sailing with his brother Berge on Long Island Sound and later became an avid sailor throughout the New England waters with Kay. In 1976 he purchased the bare hull and deck of a Bill Tripp designed Block Island 40 and built the interior, exterior trim and rigging himself. Together, they sailed from their home harbor of New London, CT to Nova Scotia and twice to the Florida Keys on their boat, the Grand Finale. He was also a masterful woodworker, building many beautiful pieces of furniture. The Derdiarians lived in Waterford, CT for 38 years before moving to the Village at Waterman Lake, Greenville, RI in 2018. He is survived by his wife, Catheryne "Kay" Derdiarian, his daughter and son-in-law, Janet and Merle Krueger, his son, Stephen Derdiarian, his grandsons and their families, Charles Derdiarian, Brian Derdiarian, and Evan Krueger and four great grandchildren. Donations in his memory can be made to the Nature Conservancy.