| B1 | 1916 | 5t | 1921 named Donau. Various duties. |
| B2 | 1916 | 5t | 1921 named Enns. Variously used for training and held in reserve. |
| B3 | 1915/6 | 5t | 1921 named Enn (a). Taken out of service 1928. |
| B4 | 1915/6 | 5t | 1921 named Salzach. 1935 renumbered B17. |
| B5 | 1915/6 | 5t | 1921 named Traun. 1935 renumbered B18 |
| B6 | 1911 | 5t | 1921 named Mur. 1927 training boat based at Krems. Disposed of 1931 |
| B7 | 1914 | 5t | 1921 named Traisen. 1931 training boat. 1935 stationary training boat. |
| B8 | 1914 | 5t | 1921 named Drau. 1931 training boat. 1933 stationary training boat. |