The French cruiser De Grasse was an anti-aircraft vessel of significant design and historical importance. Originally conceived as part of the De Grasse class, the ship was an enlarged and improved version of the earlier La Galissonnière class. The vessel was intended to have an overall length of approximately 188 meters (616 feet 10 inches), a beam of 18.6 meters (61 feet), and a draft of 5.5 meters (18 feet 1 inch). Its displacement was designed to be around 8,128 metric tons at standard load and up to 11,431 tons at deep load. Constructed with a hull divided into 16 watertight compartments by 15 bulkheads, De Grasse was built to be a resilient and formidable warship. Construction of De Grasse was interrupted during World War II when, approximately 28% complete, the vessel was captured by German forces in June 1940. The Germans initially planned to convert her into a light aircraft carrier, with provisional plans and a designation II, but the work was ultimately halted in February 1943 due to material shortages, manpower constraints, and air attack threats in Lorient. After the war, the hull was launched in 1946, but further construction was again delayed, and she was towed to Brest for completion between 1946 and 1951. Her design was substantially modified during this period to serve as an anti-aircraft cruiser. De Grasse was commissioned in 1956, after trials commenced in August 1954. She served primarily as a flagship within the Mediterranean squadron, focusing on anti-aircraft defense. From 1965 to 1971, she was involved in France’s nuclear testing campaigns in the Pacific, undergoing extensive modifications including a doubled bridge, a 50-meter-high quadripod mast mounted on the aft roof, and partial armament removal. The ship was also fitted with gas-tight facilities and washdown systems, with her crew reduced to 560 personnel to accommodate additional engineers and technicians. De Grasse participated in six nuclear testing campaigns between 1966 and 1972, marking her as a vessel of both military and scientific significance. She was decommissioned in 1973 and scrapped in La Spezia in 1975.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.