The SARK (Search and Rescue Knife) or NSAR (Navy Search and Rescue) is a folding knife designed by Knifemaker Ernest Emerson for use as a Search and Rescue knife for the US Military. It features a hawkbill with a blunt tip in order to cut free trapped victims without cutting them in the process. A variant with a pointed-tip designed for police use exists, known as the P-SARK (Police Search and Rescue Knife).

Sark (; Sercquiais: Sèr or Cerq) is a small island in the Channel Islands in the southwestern English Channel, off the coast of Normandy, France. It is a royal fief, which forms part of the Bailiwick of Guernsey, with its own set of laws based on Norman law and its own parliament. It has a population of about 600. Sark (including the nearby island of Brecqhou) has an area of . Sark is one of the few remaining places in the world where cars are banned from roads and only tractors and horse-drawn vehicles are allowed. In 2011, Sark was designated as a Dark Sky Community and the first Dark Sky Island in the world.