F-2 F class Fleet Escort
Here we see F-2, one of the F class fleet escorts, small warships produced to test out new high-pressure steam boilers. They weren't very good sea boats, but the new boilers were used in later German destroyers.
How to cite this article:
Rickard, J (12 July 2019), F-2 F class Fleet Escort , http://www.historyofwar.org/Pictures/pictures_f_class_fleet_escort_right.html