April 2015: Added U.S. Navy "Spring Styles" section.
2013-2015: With Rif Winfield wrote book French Warships in the Age of Sail, 1786-1861
June-July 2013: Posted five small early ships, including four exploration and surveying ships, in the AG section and 12 sailing storeships (two with auxiliary steam) in the AF section. This completes the auxiliary vessels portion of this site back to the construction of the Navy's first purpose-built auxiliary vessel, USS Relief, in 1835-1836.
February-March 2013: Posted the tugs and unclassified ships through 1922. This, with the addition of the photographs in June, completes the auxiliary vessels portion of this site for the period 1884-1945.
January 2013: Added 31 early ship classes to the AC, AF, AG, AH, AP, AR, ARS, AS, and AW types, thus moving the starting date of the study back to include ships on hand in or after 1884.
November 2012: Integrated the former special listing of World War I temporary auxiliaries into the main listing under the heading "1917-1919" and changed the starting date of the study from 1920 to 1917. Types covered are AC, AF, AK, AO, and AP. Similar pages were added for AG, ARS, AT, CM, and IX.
October 2012: Added the ships that received hull numbers in 1920 and 1921 but were gone by 1922 and changed the starting date of this study from 1922 to 1920. Classes added were AC 15-17, AD-1, AD 5-7, AF 2-5, AG 2-4, and AG 8-9.
September 2012: Posted the remaining classes on hand in 1922 except the tugs (AT) and unclassified (later IX). Added AK-13 and AK-14, AO-1 thru AO-14, and CM-3.
August 2012: Posted the seized German cargo ships, AK 1-10.
August 2012: Posted Navy-built Colliers Nos. 1-12 and two acquired colliers on hand in 1922 (AC 13-14).
July 2012: Posted more classes on hand in 1922: AE-1; AF-1, 6, and 7; AH-1, 2, and 3; and AP-1, 2, 3, and 5.
June 2012: Posted the nine submarine tenders that were on hand in 1922, AS 1-3 and AS 5-10.
May 2012: Posted the Navy's only lighter-than-air aircraft tender, USS Wright (AZ-1, later AV-1).
April 2012: Posted the first of the "On Hand 1922" ships: the destroyer tenders and the repair ships. These ships dated from World War I or before and most lasted to serve in World War II.
April 2012: Posted "breaking news" on YAG 2-4 based on new information from a correspondent (thank you!).
April 2012: Posted a note on sources for the auxiliary vessels portion of this web site. The link to this note is on the ship types page.
February 2012: Posted in the "References" portion of the site a listing of "U. S. Navy Section Patrol (SP) and Identification (ID) Numbers, 1916-1941." These numbers are normally encountered with World War I acquired vessels but they continued to be assigned and used within the Navy Department until the outbreak of World War II. The list is contained in eight PDF files.
January-February 2012: Posted much expanded class notes on the big tenders of the late 1930s (the AD-14, AR-5, AS-11, and AV-4 classes). These notes now constitute design histories of these iconic ships. The class notes for the AO-22, ATF-64, and CM-5 classes were similarly updated. Also corrected many typos and otherwise cleaned up the 1922-1945 pages, in some cases with the help (thank you!) of comments from readers.
June 2011: With the posting of the various tug types, the first draft of the 1922-1945 portion of the Auxiliary Vessels section of this site is complete. Current plans are to review and update the 1922-1945 pages (including adding photographs), then proceed to the ships on hand in 1922, and then if circumstances permit expand the site to include auxiliaries disposed of prior to 1922 and those added after 1945. In the meantime, enjoy this reference to all of the Navy's auxiliary ships built or acquired between 1922 and 1945.
June 2011: Auxiliary Ocean Tugs (ATA), Rescue Ocean Tugs (ATR), British Ocean-Going Tugs (BAT), plus the APL-2 class barges, the harbor tugs initially classified YN 33-56 (link on the AN page), and the small acquired vessels that became YDG 1-5 (link on the ADG page). This completes the first draft of the 1922-1945 portion of the Auxiliary Vessels section of this site.
May 2011: Ocean-Going Tugs (AT) and Fleet Ocean Tugs (ATF).
March 2011: Salvage Vessels (ARS), Submarine Rescue Vessels (ASR), and British Salvage Vessels (BARS).
January 2011: Posted in the References section of this site the Shipping Board publication Contract and Requisitioned Steamships Taken Over on August 3, 1917, a 40-page ship listing that contains some additional data not in the 1920 Register, below.
January 2011: Posted in the References section of this site the Register of Ships Owned by United States Shipping Board, August 1, 1920, which includes a long ship listing and numerous foldout ship plans.
December 2010: The special IX category (miscellaneous types, mostly small).
August 2010: The final AO classes, AO-49, 51, 66, 68, 80, 89, 101, and 105; plus the AOG classes and the station tankers and station cargo ships (IX).
July 2010: The first AO classes, AO-22, 34, 36, 41, 45, and 46.
June 2010: The final AK classes, AK-156 (the C1-M-AV1 type) and AK-227 (10 "Victory Ships").
May 2010: The AK-70 class (60 EC2 "Liberty ships") and the AK-80 class (the N3 "Bowes Coasters").
January 2010: The miscellaneous AK types (all except the EC2, N3, C1-M-AV1, and VC2 types).
September 2009: AG-23, 25, 26, 29, 36, 41, 42, 44, 45, 47, 49, 50, 51, 68, 72, and 73 classes, completing the AG category.
August 2009: AP 110-159, the three large war-built classes, completing the transports category.
June 2009: The rest of the acquired transports: AP-53, 54 (with 61), 62, 63, 74, 75, 162, and 177.
May 2009: More classes of acquired transports: AP-28, 29, 31, 33, 41, and 45.
February 2009: Started the acquired transport classes: AP-6, 7, 19, 20, 21, 23, and 24. Also filled some gaps in earlier class notes, mostly for AP and APA classes.
January 2009: Added the small net-laying classes: AN-6, 38, and 78. Completed (proofread and clarified) the reference tables on USN World War II shipbuilding programs and contracts.
December 2008: A final batch of specialized classes: ACM-1 and 4, AGB-1, AGS-1, 2, 3, 4, 6, and 11, AN-5, AVC-1, CM-5 and 11, and CMc-3 and 4.
November 2008: Possibly the most obscure ships in this list: YAG 1-34. The small IX classes were their nearest counterpart.
October 2008: Some more specialized classes: AH-5, 6, and 12, APc-1, APL-1, APR-1, AW-1 and 3, and BAK-1.
September 2008: Appendix 3, U.S. Navy World War I Era Auxiliary Vessels, 1917-1919. This is a photographic ship recognition guide for the transports and supply ships operated by the Naval Overseas Transportation Service (NOTS) and the Cruiser and Transport Force during World War I.
August 2008: Some specialized classes: AKN-1 and 5, AKS-1 and 5, APH-1, APM-9, APV-1, and AVS-1 and AVS-5.
August 2008: Appendix 2, The Auxiliary Vessels Board, 1941-1948. This Board is mentioned in many of the World War II class histories in this list.
July 2008: The submarine tender classes: AS-11, 13, 20, 21, 22, and 23; the large seaplane tenders: AV-4, 7, 8, 9, 10, and 14; and the Vehicle Landing Ships: LSV-1 and 3. The introductory pages were also modified to focus on the 1922-45 period.
November 2007: The McKellar section of the Shipscribe site was completed and posted. During the first half of 2008 major contributions were made to the World War I portion of the Naval Historical Center's Online Library (see Appendix 3 above for some of this work).
July 2007: The larger repair ship classes: AR-5, AR-9, AR-10, AR-13, AR-17, ARG-2, and ARV-1. The smaller repair ship types are included in the LST conversions, below.
June 2007: The remaining LST converson classes: APB-35 and 41, APB-45, ARB-1, ARL-1, 10, and 40, ARSD-1, ARST-1, ARVA-5, and ARVE-3. For the other LST conversions see the AGP-4 and AGP-20 classes.
June 2007: The combat-loaded and "quasi-attack" transport classes: AP-13, 42, 46, 67, 68, 69, 71, 72, 73, 76, 77, 102, 103, 171, and 172. The term "quasi-attack" for the last four of these classes is from Norman Friedman.
May 2007: The attack transport classes: APA-1, 2, 4, 6, 10, 18, 21, 25, 33 (parts 1 and 2), 49, 52, 55, 57, 89, and 117.
January 2007: The last AKA class: AKA-21.
March-April 2006: Most of the AKA classes: AKA-1, 2, 5, 9, 10, 12, 15, and 64.
March 2006: The ADG/YDG classes: ADG-8, YDG-6.
February 2006: AGC-369 plus the AGP classes: AGP-1, 2, 3, 4, 12, and 20.
January 2006: The AVP-1 and AGC-7 classes.
June 2004: AGC-6. September 2005: AP-47 (with AP-105).
December 2001-January 2002: The AGC-1 and AGC-4 classes.
December 2000-February 2001: The store ship classes: AF-10, 11, 12, 14, 16, 19, 20, 23, 24, 25, 26, 27, 28, and 30, plus the unrelated AG-33.
October 2000: The AVP-10 and AGP-6 classes.
July 2000: The ammunition ships: AE-3, 8, 10, and 11.
June 2000: The destroyer tender classes: AD-14, 16, 20, 21, 22, 26, and 32.