The Swedish Navy () is the naval branch of the Swedish Armed Forces. It is composed of surface and submarine naval units – the Fleet (Flottan) – as well as marine units, the so-called Amphibious Corps (Amfibiekåren). In Swedish, vessels of the Swedish Navy are given the prefix "HMS," short for Hans/Hennes Majestäts Skepp (His/Her Majesty's Ship). In English, this is often changed to "HSwMS" ("His Swedish Majesty's Ship") to differentiate Swedish vessels from those of the British Royal Navy.[citation needed]