Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The latest information on the Coronavirus Disease 2019 (COVID-19) is available on For USDOT-specific COVID-19 resources, please visit our page.

United States Department of Transportation United States Department of Transportation

Coastal Tanker

U.S. Maritime Commission type T1-M-A1

The T1 was a small “coastal” gasoline tanker designed to be used either by the military (mostly sub-type A2) or transferred to the British Ministry of War Transport as part of the Lend-Lease program (mostly sub-type A1). The two sub-types were very similar; 221 feet long, diesel-powered with a top speed of 10 knots.

Use “play” button to rotate. Use “expand” button for full screen. Hold “Ctrl” and scroll mouse wheel to zoom in.


The U.S. Navy typically assigned T1s the hull designation “AOG.” Their small size and shallow draft made them ideal for operating around the small islands and shallow ports of the southwestern Pacific during World War II, where they fueled combat vessels.  Most of the T1s that the U.S. government loaned to Britain were subsequently returned after the war and sold to commercial operators in the Far East.


Detailed view of emergency life rafts and tank access.



Detailed view of vessel house, with boat deck and guns.


Detailed view of forward deck, with cargo boom and piping.


(Maritime Administration Heritage Asset, Object 2011.001R.0196)