TSS Maianbar was a coastal steamship of the North Coast Steam Navigation Company.

[1] She replaced the one-year-old Minimbah, a 460 GRT steamship that broke her back after unsuccessfully trying to cross the Manning River Bar earlier that year.

Minimbah's engine and boiler were salvaged, shipped back to Scotland and installed in Maianbar.

After being re-floated, she went to Sydney to be overhauled and lengthened by 20 feet (6.1 m) by cutting the ship in two and inserting plating between the two halves.

[1] In 1937, the Port Stephens Steamship Company bought Maianbar from the North Coast Steam Navigation Co.[2] In 1940 her original owners bought the vessel back, and on 5 May started towing her back from Port Stephens to Sydney.