The "Luftwaffe" initially used the aircraft to support the "Kriegsmarine", making great loops out across the North Sea and, following the fall of France, the Atlantic Ocean. The aircraft was used for maritime patrols and reconnaissance, searching for Allied convoys and warships that could be reported for targeting by U-boats. The Fw 200 could also carry a bomb load or naval mines to use against shipping, and it was claimed that from June 1940 to February 1941, they sank 331,122 tonnes (365,000 tons) of shipping despite a rather crude bombsight. The attacks were carried out at extremely low altitude in order to "bracket" the target ship with three bombs; this almost guaranteed a hit. Winston Churchill called the Fw 200 the "Scourge of the Atlantic" during the Battle of the Atlantic due to its contribution to the heavy Allied shipping losses.