USS Mettawee, a 1942, T1-M-A2 tanker
General characteristics
USNS Alatna, 1956 T1 tanker

The T1 tanker or T1 are a class of sea worthy small tanker ships used to transport fuel oil before and during World War II, Korean War and Vietnam War. The T1 tanker classification is still in use today. T1 tankers are about 200 to 250 feet (61 to 76 m) in length and are able to sustain a top speed of about 12 knots (22 km/h; 14 mph). The hull designation AO is used by the US Navy to denote the ship is a T1 oil tanker and AOG that the T1 is a gasoline tanker. The small size allows the T1 to enter just about any sea port or to anchor around a small island, this was very useful during the Pacific War. The T1 tanker can carry about 48,000 to 280,000 bbls. Some T1 tankers were used to transport goods other than oil, a few were used for black oil-crude oil, diesel, chemicals and rarely bulk cargo like grain. T1 tankers are also called liquid cargo carriers. The T1 tanker has about a 6,000 to 35,000 deadweight tonnage (DWT) of cargo. The small size also gives the ships short turn around time for repair, cleaning, loading and unloading. A T1 tanker carrying dirty cargo, like crude oil needs a few weeks of labor to clean before carrying clean cargo. Most T1 ships during World War II were named after major oil fields.[1]

T1 tankers are operated by the US Navy, War Shipping Administration and United States Maritime Commission. Some T1s were loaned to England in the Lend-Lease program for World War II, after the war most were returned to the US. After World War II many of the T1 ships were sold to for civilian use. Each T1 had emergency life rafts on the boat deck. The ships had cargo booms and piping to load and unload fuel. During war time the T1 are armed for protection with deck guns. A typical ship may have one single 3"/50 dual purpose gun, two 40 mm guns and three single Oerlikon 20 mm cannon. A T1 at war time normally had a crew of 38 and up to 130. If operating as a United States Merchant Marine ship, the crew would be a mix of civilian Merchant Marines and United States Navy Armed Guards to man the guns.[2][3][4][5][6][7][8]

US classes

Lead ship of T1 class, T1-MT-M1, USS Patapsco, sister ship of USS Natchaug
USS Chehalis a 1944 T1-MT-M1 tanker[27]

Other T1 type ships

Notable incidents

See also


  1. ^ National Park Service, Scotts Bluff
  2. ^ "NJ Scuba, Tanker". Archived from the original on 2016-10-07. Retrieved 2017-01-10.
  3. ^, Coastal Tankers
  4. ^, Coastal Tanker
  5. ^, Activation specifications for t1 -m-bt2 tanker
  6. ^ Auke Visser's, T1 Tanker types
  7. ^ USS Klickitat (AOG-64)
  8. ^, T-1 Tankers
  9. ^ Mettawee tanker
  10. ^ T1-M-A2 tanker
  11. ^ T1-M-A2 tanker Todd Galveston Drydocks Inc., Galveston, Texas
  12. ^ T1-M-BT1 tanker
  13. ^ Klickitat Class, Walter Butler ShipBuilders, Inc., Duluth MN
  14. ^, Klickitat Class Gasoline tankers
  15. ^, USNS Piscataqua (T-AOG-80)
  16. ^ T1-M-BT2 tanker
  17. ^ T1-M-BT2, Tankers built by Todd Houston Shipbuilding Co., Houston, Texas
  18. ^ T1-MT-M1 tanker
  19. ^ Patapsco gasoline tanker
  20. ^ T1-S-C3
  21. ^ ET1-S-C3 Tankers
  22. ^, T-AOG-81 Alatna Small T1 Tanker Class
  23. ^ Dictionary of American Naval Fighting Ships, Volume 3, edited by James L. Mooney, page 82
  24. ^ NavSource Online: Service Ship Photo Archive T-AOG / T-AOT-81 Alatna
  25. ^, Alatna Small T1 Tanker
  26. ^ AOG
  27. ^ T1 list
  28. ^ Sulphur Bluff
  29. ^, Escatawpa T1-M-A2
  30. ^ Nanticoke T1-M-BT1
  31. ^, Nodaway
  32. ^, Dynafuel
  33. ^ Dynafuel collision with SS Fernview
  34. ^, Sebasticook
  35. ^ ", USS Tetonkaha (AOG-41)". Archived from the original on 2007-09-28. Retrieved 2017-04-07.
  36. ^, MV Esso Regulus
  37. ^, MV Alkene