The German Navy currently has three signals intelligence (SIGINT/ELINT) and reconnaissance vessels of the Oste class (Type 423), built in 1986-89. Construction of their replacement (Type 424) has already begun.

Here, two of them, Oste and Alster, visiting Kiel:


Oste and Alster in Kiel

As far as I know, in 1/700, there is no kit.