The 40th Heli Squadron is a helicopter squadron of the Belgian Air Force based at Koksijde Air Base. It is dedicated to search and rescue, anti-submarine warfare and troop transportation operations. It operates four NH90 NFH helicopters. Before the arrival of the NH90 NFH the squadron operated Westland Sea King and Alouette III helicopters on behalf of the Belgian Navy, the Squadron embarks a helicopter on F930 Leopold I and F931 Louise-Marie - Karel Doorman class frigates when sailing on deployment and has also have had helicopter embarked on Dutch frigates as well