The Type 139 patrol trawler was a class of vessel used as a training ship by the Federal German Navy.

Both vessels in the class were originally built for the Royal Navy in 1942 as Isles-class naval trawlers.

Davie & Sons yard in Lauzon, Quebec,[1][2] and served in the anti-submarine warfare role to the end of World War II.

When the Federal German Navy was established in 1956, Dochet and Flint were acquired and classified as Type 139 patrol trawlers.

In the Federal German Navy, Eider and Trave were employed as fishery protection vessels and for training with light-caliber guns.