The Naval Protection Force (German: Marineschutzkräfte — MSK) was a marine unit of the German Navy. It had the size of a Battalion and was part of the 1st Flotilla (Einsatzflottille 1). It was established on April 1, 2005, but traces its roots back to 1958, when the so-called Sea battalion (Seebataillon) was activated. Its headquarters was in Eckernförde on the Baltic Sea. Next to the Naval Special Deployment Force (Spezialisierte Einsatzkräfte Marine, SEKM), the Naval Protection Force were considered to be a marine element within the German Navy.