Ordered by the Royal Navy in 1941 the destroyers of the 5th Emergency Flotilla became known as S-class and served as fleet and convoy escorts in World War II. In the last months of the war three were transferred to the Royal Neth. Navy for service in the Far East. HMS Serapis was renamed HNLMS Piet Hein and served in Indonesian War of Independence and saw action in the Korean War. She was sold for scrap in 1962.

The sturdy Fokker C.XIw was designed and built for service in the Royal Netherlands Navy. Development started in early 1934. The biplane scout was the first Dutch aircraft which could be catapult launched. At that time, a new flagship for the Netherlands East Indies Squadron was under construction and would receive a Heinkel K 8 catapult. Fifteen aircraft were ordered and served as long-range reconnaissance for the fleet from 1936 to 1942.

It was mainly operated in the Netherlands Indies and...