Erna was an 865 GRT coaster that was built in 1922 by Howaldtswerke, Kiel, Germany for German owners.

She was seized by the Allies at Kristiansand, Norway in July 1946, passed to the Ministry of Transport (MoT) and renamed Empire Confederation.

The ship was built in 1922 as yard number 660 by Howaldtswerke, Kiel.

[2] On 14 February 1944, Erna was involved in a collision with U-738 off Gotenhafen, German-occupied Poland (43°31′N 18°33′E / 43.517°N 18.550°E / 43.517; 18.550).

In 1953, she was sold to Compagnia Santa Angelica, Costa Rica and renamed Dmitris.