NRP Douro (P591) (ex-HDMS Ravnen (P560)) is a former patrol boat of the Royal Danish Navy. Since 2015 she is in service with the Portuguese Navy.
History She is the fourth ship from series 2 of the , which is also known as the Standardflex 300 or SF300 class. She was launched in 1994, with the commissioning taking place on 7 October 1994.
In October 2014, Ravnen was sold to the Portuguese Navy together with four other ships of the class. She was renamed Douro. After a refit she was commissioned in 2015.
References
External links http://www.naval-technology.com/projects/fly/