
Ex-whale oil factory ship TONAN MARU No. 2 was torpedoed and sunk in the East China Sea by an American submarine in August 1944. Sister-ship TONAN MARU No. 3 was sunk by Task Force 58's aircraft at Truk Lagoon in Operation "Hailstone" in February 1944.
| Builder and Year Completed: |
Osaka Iron Works 1937 |
| Gross tonnage: | 19,200-tons (nominal). |
| Dimensions: | 534.8' x 74' x 36' |
| Propulsion: | Triple-expansion engines & L.P. turbines, 7,000 IHP (TM2), 6,000 IHP (TM3), two shafts, 13.3 knots (TM2) 14.1 knots (TM3) maximum speed. |
| Oil Cargo Capacity: | 169,425 barrels @ 42 gals/barrel or 23,114-tons of crude oil @7.33 barrels per metric ton |
| Armament: | 2 x 4-inch, MGs, DCs |

