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 Flyvefisken ships  were constructed using an innovative  modular design known as StanFlex: they have a standard hull in which  containerised weapons or systems can be placed. This allows them to  rapidly change roles, typically in 48 hours. This enables the ships to  be configured to perform the following roles:
Surveillance/pollution  control
Combat
Mine countermeasures/minehunter (MCM)
Minelayer
Ships  of the class              
P550 Flyvefisken
P551 Hajen
P552 Havkatten
P553 Laxen
P554 Makrelen
P555 Støren
P556 Sværdfisken 
P557 Glenten
P558 Gribben
P560 Ravnen
P561 Skaden
P562 Viben 
P563 Søløven
Hdms Laxen is seen here arriving Leith
Sailing down the Firth of Clyde
Hdms's Skaden, Raven and Glenten alongside in Leith



