The Flyvefisken-class patrol vessels are warships of the Royal Danish Navy. The class is also known as the Standard Flex 300 or SF300 class. The five vessels sold to the Portuguese Navy are locally referred as Tejo class.

The Lithuanian Navy is the naval arm of the Lithuanian Armed Forces. Though formally established on 1 August 1935 its roots stretch back as far as naval engagements on the Baltic Sea in the Medieval period. Lithuanian naval units saw some service with Soviet naval forces during World War II, and the navy has been re-established in its own right and continues to expand since Lithuania's independence in 1990.