SS Diamond State (T-ACS-7)
History
United States
Name	Diamond State
Builder	Todd Shipyards, Los Angeles Division, California
Laid down	1961
Launched	11 May 1961
Acquired	1989
In service	4 March 1965
Out of service	28 July 2006
Identification	IMO number: 5170185 MMSI number: 366476000 Callsign: WLRL Hull number: T-ACS-7
Status	National Defense Reserve Fleet - Logistical Support
Notes	Launched as SS Japan Mail
General characteristics
Class and type	Keystone State-class crane ship
Displacement	31,500 tons
Length	668 ft 5 in (203.73 m)
Beam	76 ft 1 in (23.19 m)
Draft	33 ft 6 in (10.21 m)
Propulsion	two Combustion Engineering boilers two General Electric geared turbines single propeller, 10,747shp
Speed	17 knots (31 km/h; 20 mph)
Capacity	300+ cargo containers
Complement	Full operational status: 89 civilian mariners Reduced operational status: 10 civilian mariners

SS Diamond State (T-ACS-7) is a crane ship in the National Defense Reserve Fleet (NRDF) for the United States Navy. The ship was named for the state of Delaware, which is also known as the "Diamond State". The ship was initially a bulk freighter named SS Japan Mail when launched in 1961 and entered service in 1962 with the American Mail Line. In 1971, the ship was lengthened and renamed SS President Truman. In 1987, the vessel was taken over by MARAD and converted to a crane ship and in 1989, renamed Diamond State.

Diamond State was laid down on 22 November 1960, as the break-bulk freighter SS Japan Mail, ON 287976, IMO 5170185, a Maritime Administration type (C4-S-1s) hull, under MARAD contract (MA 87). Built by Todd Shipyards, Los Angeles Division, San Pedro, Los Angeles, California, hull no. 78, she was launched on 8 August 1961 and delivered to MARAD on 19 April 1962, entering service for American Mail Line (AML), a subsidiary of American President Lines (APL). In 1971 she was lengthened and converted to a type (C6-S-1a) hull container ship by Bethlehem Steel, San Francisco, California. On 14 November 1975, the ship was renamed President Truman, after AML was merged into APL. She was returned to MARAD on 21 January 1987, and placed in the National Defense Reserve Fleet (NDRF). In 1988 the ship was converted to a type (C6-S-1aq) crane ship, completed 15 December 1988,^[1] and assigned to the Ready Reserve Force, (RRF), under operation control of Military Sealift Command (MSC) and placed in service as SS Diamond State (ACS-7), 22 February 1989. Diamond State is one of 10 crane ships in the Surge Force and was berthed at Houston, Texas. and assigned to Maritime Prepositioning Ship Squadron Three and was maintained in a five-day readiness status (ROS 5). She was removed from MSC control, withdrawn from the RRF by reassignment to the NDRF (Beaumont, Texas) on 28 July 2006. ^{[citation needed]}

• Silverstone, Paul (2011). The Navy of the Nuclear Age, 1947-2007. Routledge. ISBN 978-1135864668.

• SS Diamond State (T-ACS-7)
•  This article includes information collected from the Naval Vessel Register, which, as a U.S. government publication, is in the public domain. The entry can be found here.

• National Defense Reserve Fleet Inventory