HMS Princess Beatrix was a commando troop ship of the Royal Navy during the Second World War. Built as a civilian passenger liner in 1939, she was named the MS Prinses Beatrix, after Princess Beatrix of the Netherlands, and operated by Stoomvaart Maatschappij Zeeland (SMZ) (The Zealand Steamship Company) between Flushing and Harwich, along with her sister ship, MS Koningin Emma. After fleeing to Britain after the German invasion in 1940, she was requisitioned by the British Ministry of War Transport, renamed HMS Princess Beatrix and converted to a troopship at Harland and Wolff's yard in Belfast. During the war her main role was transporting British Commandos, and she participated in the Lofoten Islands Raid and the Dieppe Raid. She had the advantage of a high speed that allowed hit and run operations. Later designated as a landing ship, infantry (medium) she took part in the landings in North Africa, Sicily, Salerno, Anzio, and southern France. In 1946 Princess Beatrix was returned to her owners and continued to operate as ferry from Hook of Holland until 1969, when she was scrapped in Antwerp, Belgium. Construction The MS Prinses Beatrix was ordered by the Zeeland Steamship Company (SMZ) in December 1937 to operate between Vlissingen (Flushing) and Harwich. The keel was laid on 7 May 1938 at the De Schelde shipyard at Vlissingen, and the ship was launched on 25 March 1939 by Prince Bernhard. During sea trials Prinses Beatrix made more than which was more than was contractually agreed. On 19 May 1939 the ship was handed over to the SMZ. It had a gross register tonnage of 4,135 tons and was capable of carrying 1,800 passengers. Propulsion was provided by two 2-stroke Sulzer diesel engines with a total output of 12,500 shp. Service history Prinses Beatrix entered service on 3 July 1939, but after the outbreak of war on 1 September 1939, was withdrawn, and remained in port. On 10 May 1940 the Germans launched their invasion of the Netherlands, dropping mines in the Schelde estuary, and bombing and strafing shipping. Prinses Beatrix promptly fled, arriving at London on the 15th. Troop transport Two days later the British Ministry of War Transport chartered her as a troop transport. She was fitted with "degaussing" coils as protection against German magnetic mines and sailed with her original civilian crew on board in addition to a Dutch Marine detachment. The ship was