This article studying the issue of sovereign immunity of ships and vessel protection detachments from criminal jurisdiction of foreign courts. The issue immunity of ships from foreign criminal jurisdiction can be understand from Schooner Exchange case onwards. In the initial stages the courts were given absolute immunity of the government ships in the foreign jurisdiction. Later on the courts, jurists and states classified the immunity in two heads such as personal immunity and functional immunity. Immunity not only given to the troika but also to the other officials engaged in the sovereign functions for their respective states with the exception of universal crimes. The status of the warships, government non commercial ships under the law...