On September 8, 2012, the SIGMA class frigate, Allal Ben Abdellah, built by damen Schelde Naval Shipbuilding (DSNS) in Vlissingen, was transferred to the Royal Moroccan Navy.

The delivery of the last ship of a series of three marks the culmination of a period of dedicated and successful partnership with the Royal Moroccan Navy. All three ships were delivered in time, on schedule, meeting all the requirements as stated in the contract to the full satisfaction of the customer.

The delivery of the last of three frigates was achieved within four-and-a-half years from the effective date of contract, after a period of thorough engineering and three years of construction. The first Tarik Ben Zayid was commissioned on September 10, 2011, the second Sultan Moulay Ismail was commissioned on March 10, 2012.

The Damen Shipyards Group offers a complete range of naval and patrol vessels ranging from 7 to over 200 metres. Part of this portfolio are the Damen Schelde Naval Shipbuilding (DSNS) naval combatants and auxiliaries, embodied by the SIGMA and ENFORCER series.

At present DSNS also has under construction for the Royal Netherlands Navy: four Patrol Ships and a Joint Logistic Support Ship, the largest military vessel built by DSNS so far.