Fairey Seafox

The Fairey Seafox was built to comply with the specification S.11/32. The first two prototypes appeared in 1936 and they flew for the first time on 27th May being the first 64 exemplars delivered in 1937. Flights were organised as the 700 Naval Air Squadron of the Fleet Air Arm.
It was an all-metal monocoque fuselage with metal covered wings on the leading edge with the rest covered in fabric. It was powered by a 395hp (295Kw) 16-cylinder air-cooled Napier Rapier H engine and had a defensive Vickers K gun, although it seems that the original defensive armament was a 0.303in Lewis Mk.II and has provision for either 2x100lb bombs or 8x20lb bombs mounted in underwing racks. It had a cruise speed of 106mph (171km/h) with a range of 440 miles (710km).
Even if its performance was quite correct, it was criticized for being underpowered with bad engine cooling and higher than desired landing speeds.
A Seafox played a vital part in 1939 during the Battle of River Plate when it acted as a spotter for the naval gunners against the German pocket Battleship Admiral Graf Spee, which ended in the scutting and destruction of this late one.
They operated early in the war mainly from light-cruisers like HMS Emerald, HMS Neptune, HMS Orion, HMS Ajax, HMS Arethusa and HMS Penelope as well from armed merchant cruisers like HMS Pretoria Castle, HMS Asturias and HMS Alcantara until 1943 when they were replaced by more modern and capable airplanes.

Sources:
1. https://en.wikipedia.org/wiki/Fairey_Seafox
2. http://forum.valka.cz/topic/view/54423