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Oilers (AO)
Classed as Fuel Ships until July 1920
1917-1919
World War I Temporary Tankers (25 ships)
On Hand 1920-1922
AO-1 (Kanawha) class (AO 1-2, ex Fuel Ships Nos. 13-14)
AO-3 (Cuyama) class (AO 3-6, ex Fuel Ships Nos. 15-18)
AO-7 (Arethusa)
AO-8 (Sara Thompson)
AO-9 (Patoka) class (AO-9, 11-13, 18-21)
AO-10 (Alameda) class (AO-10, 15-17)
AO-14 (Robert L. Barnes) (originally AK-11)
1922-1945
AO-22 (Cimarron) class (AO 22-27, 30, 32)
AO-34 (Chicopee) class (AO 34-35)
AO-36 (Kennebec) class (AO 36-40, 48)
AO-41 (Mattaponi) class (AO 41-44, 47)
AO-45 (Big Horn)
AO-46 (Victoria)
AO-49 (Suamico) class (AO 49-50, 65, 67, 73-79)
AO-51 (Ashtabula) class (AO 51-64, 97-100)
AO-66 (Atascosa)
AO-68 (Chiwawa) class (AO 68-72)
AO-80 (Escambia) class (AO 80-88, 93-96)
AO-89 (Pasig)
AO-101 (Cohocton) class (AO 101-104)
AO-105 (Mispillion) class (AO 105-109)
Other AO Hull Numbers, 1920-1945
AO 28 (Sangamon) class (AO 28-29, 31, 33): became CVE 26-29
AO-90 (Shikellamy): see AOG-47
AO 91 (Pasig) class (AO 91-92): see AW 3-4