USS Granville S. Hall (YAG-40)

Granville S. Hall was a liberty ship named after Granville S. Hall. She was built at the J.A. Jones Construction, Panama City, Florida, and launched in 1944, to serve as a civilian cargo ship. In 1953 she was acquired by the United States Navy for use as a miscellaneous auxiliary service craft under the designation YAG-40. As YAG-40 she took part in Operation Castle before being laid up again in 1957. Reactivated in 1962, she was commissioned as Granville S. Hall (YAG-40) and participated in Project SHAD and Project 112. She was scrapped in 1972.

USS Granville S. Hall off the coast of Oahu, 8 November 1965
United States
Name: Granville S. Hall
Namesake: Granville Stanley Hall
Owner: War Shipping Administration (WSA)
Operator: A.L.Burbank & Co., Ltd.
Ordered: as type (EC2-S-C1) hull, MC hull 2325
Builder: J.A. Jones Construction, Panama City, Florida
Cost: $620,529[1]
Yard number: 66
Way number: 4
Laid down: 16 September 1944
Launched: 24 October 1944
Sponsored by: Mrs.Isabell Gabriel
Completed: 7 November 1944
Status: Transferred to US Navy, 18 May 1953
United States
Name: YAG-40
Acquired: 18 May 1953
Out of service: 1957
Fate: Placed in the Pacific Reserve Fleet, San Diego, California
United States
Name: Granville S. Hall
Commissioned: 20 October 1962
Decommissioned: May 1971
Struck: May 1972
Fate: Sold for scrapping, 31 January 1972, withdrawn from fleet, 9 March 1972
General characteristics [3]
Class and type:
  • 441 feet 6 inches (135 m) oa
  • 416 feet (127 m) pp
  • 427 feet (130 m) lwl
Beam: 57 feet (17 m)
Draft: 27 ft 9.25 in (8.4646 m)
Installed power:
  • 2 × Oil fired 450 °F (232 °C) boilers, operating at 220 psi (1,500 kPa)
  • 2,500 hp (1,900 kW)
Speed: 11.5 knots (21.3 km/h; 13.2 mph)
  • 562,608 cubic feet (15,931 m3) (grain)
  • 499,573 cubic feet (14,146 m3) (bale)

Service history

Granville S. Hall (YAG-40) was laid down on 16 September 1944, under a Maritime Commission (MARCOM) contract, MC hull 2325, as the Liberty Ship Granville S. Hall, by J.A. Jones Construction, Panama City, Florida. She was launched 24 October 1944, sponsored by Mrs. Isabelle Gabriel, wife of resident MARCOM plant enineer; and placed in service 7 November 1944, for cargo ship duty with A.L.Burbank & Co., Ltd. She entered the National Defense Reserve Fleet at Suisun Bay in California, 15 October 1948.[4][1]

Granville S. Hall was taken out of reserve in May 1953, and transferred to the US Navy and designated YAG-40. She was fitted out with scientific instruments of all kinds, including nuclear detection and measurement devices which enabled her to explore fallout areas and carry out ship decontamination tests. Granville S. Hall was also equipped with remote control devices which allowed her to be operated by a small crew in a sealed hold, and thus making her able to explore fallout areas of heavy concentration. She took part in the Operation Castle atomic bomb tests from March to May 1954, and other radioactivity and remote control tests. She was placed in the San Diego Reserve Fleet, in late 1957.[5]

Reactivated again in May 1962, she was placed in commission 20 October 1962, as Granville S. Hall (YAG-40), at Triple A Machine Shop, San Francisco, California, with Lieutenant Commander Homer Wendle Kepler, in command. Granville S. Hall and her sister ship, George Eastman, were ordered to Pearl Harbor, Hawaii, arriving there 24 November, for underway training. Following completion of training she resumed her scientific work.[2][5]

During the remainder of the 1960s, AG-40 served as a floating laboratory and administrative command ship during Project SHAD ("Shipboard Hazards & Defense") and Project 112, where their mission was to evaluate the effectiveness of shipboard detection and protective procedures against biological/chemical warfare agents and to determine the distance released agents could travel. A measure of Plutonium contamination on Johnston Atoll was another mission for the ship. During the remainder of the decade, she served in connection with Project SHAD ("Shipboard Hazards & Defense"), an investigation of the threats posed to Navy ships by chemical and biological agents. These missions ended in the early 1970s and, in May 1971, after a rescue mission to the La Balsa expedition, Granville S. Hall was stricken from the Naval Vessel Register and turned over to the Maritime Administration. She was sold for scrapping in March 1972.



  • "Granville S. Hall (YAG-40)". Dictionary of American Naval Fighting Ships. Navy Department, Naval History and Heritage Command. 13 July 2015. Retrieved 9 December 2019. This article incorporates text from this source, which is in the public domain.
  • "Jones Construction, Panama City FL". 13 October 2010. Retrieved 9 December 2019.
  • Davies, James (May 2004). "Specifications (As-Built)" (PDF). p. 23. Retrieved 9 December 2019.
  • "SS Granville S. Hall". Retrieved 9 December 2019.
  • "USS Granville S. Hall (YAG-40)". 24 February 2017. Retrieved 9 December 2019.
  • Photo gallery of USS Granville S. Hall at NavSource Naval History

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