Sigma-class design

Sigma versions

• Sigma frigate
• Sigma corvette
• Sigma fast attack corvette

	Compact Sigma 5910	Compact Sigma 7310	Sigma 9113	Sigma 9813	Sigma 9814	Sigma 10513	Sigma PKR 10514	Sigma 10514 LROPV
Ordered by	–	–			Vietnam People's Navy
Type	Fast attack corvette	Fast attack corvette	Corvette	Frigate	Frigate	Frigate	Frigate	Long Range Offshore Patrol Vessel
Length	58.6 meters	74.2 meters	90.01 meters	97.91 meters	99.91 meters	105.11 meters	105.11 meters	107.5 meters
Beam	10.00 meters	10.00 meters	13.02 meters	13.02 meters	14.02 meters	13.02 meters	14.02 meters	14.02 meters
Draft	3.10 meters	3.10 meters	3.60 meters	3.75 meters	3.75 meters	3.75 meters	3.75 meters	3.75 meters
Displacement	750 tons	900 tons	1,692 tons	2,075 tons	2,150 tons	2,335 tons	2,365 tons	2,575 tons
Main machinery	3 x –	4x 3900 kW	2 x 8910 kW	2 x 8910 kW		2 x 8910 kW	2 x 10.000kW	2 x 13410 kW
Speed	18 knots	18 knots	18 knots	18 knots	tbd	18 knots	18 knots	18 knots
Speed	32 knots	34 knots	28 knots	28 knots	tbd	28 knots	28 knots	28 knots
Endurance	2,000 nmi	2,000 nmi	3,600 nmi	4,000 nmi		4,000 nmi	5,000 nmi	5,000 nmi+
Primary sensors	Thales Smart-S MK2	Thales NS-100	Thales MW08	Thales SMART-S MK2	Thales SMART-S MK2	Thales SMART-S MK2	Thales SMART-S MK2	Thales SMART-S MK2
Complement	37	50	80	91	103	110	122	122
Helicopter capabilities	none	none	deck only	deck and hangar	deck and hangar	deck and hangar	deck and hangar	deck and hangar

• Sigma 8313
• Sigma 8011
• Sigma 7613
• Sigma 6610

Users

• Indonesia has four SIGMA 9113 Diponegoro-class corvettes in active service from 2009. In August 2010, Indonesia signed a deal to build s based on the SIGMA 10514 in PT PAL Shipyard at Surabaya, Indonesia. A second contract was signed in February 2013. Eventually six ships will be built. The first ship, KRI Raden Eddy Martadinata, was commissioned on 7 April 2017 at Tanjung Priok. The second ship, KRI I Gusti Ngurah Rai, was commissioned on 10 January 2018.
• Morocco has ordered two 9813 class heavy corvettes and a light 10513 class frigate based on a modified design.

  Under construction

• Mexico has ordered 1 Sigma 10514 LROPV based upon the Indonesian variant with different weapon systems and different role. The Mexican navy will use its Sigma frigate as a long range patrol vessel. The keel was laid on 17 August 2017, and was launched on 23 November 2018 and service to begin in 2020. The ship will be built in six modules, with two of these modules built by Damen Schelde Naval Shipbuilding in Vlissingen in the Netherlands, and the remaining four by the Mexican Navy shipyard in Salina Cruz under the supervision of Damen Schelde Naval Shipbuilding. The Sigma will replace the four Allende class, and two Bravo class of frigates.

  Potential operators

• Poland - Damen Schelde submitted its SIGMA PL 10514 in two variants for the competition to supply the Polish Navy with options for their Miecznik & Czapla programmes. Miecznik will be a coastal defense ship and Czapla a patrol ship.
• Peru - The Peruvian Navy plans to acquire between three and six ships, with a displacement of 3,000 to 4,000 tons. During the 6th International Exhibition of Technology in Defense and Prevention of Natural Disasters Damen Group offered the Sigma-class design to the Peruvian Navy. It believes that the variety of models of frigates offered by the Sigma series allows to fit without difficulty to the requirements of the Peruvian Navy.
• Colombia - The Colombian Navy wants to buy new ships, which will replace the. Damen is one of the potential candidates to build the ships for the Colombian Navy.
• Romania is planning to purchase four corvettes in the upcoming seven years, which have to be built and equipped in a Romanian building yard. Previously, in December 2016, the Romanian government decided that Damen Group would build four Sigma light frigates for a total of 1.6 billion euro at the Damen Galați Shipyard. However, the new Romanian government is repealing this decision and will re-open the procurement again. Nonetheless, Damen Group is a top contender for the job, since it has the only shipyard in Romania that has recent experience with building new naval ships reasonably fast and at a competitive price.

  Failed bids

• Malaysia Damen Schelde participated in the competition to supply the Royal Malaysian Navy with six frigates under the Second Generation Patrol Vessel program. It lost to the French Gowind class. The other competitor was the MEKO A200.
• Egypt Damen Schelde was in competition for four Sigma corvettes for the Egyptian Navy. The French Gowind-class corvette won this bid. The other competitor was the TKMS MEKO A200.
• Philippines Damen Schelde bought bidding documents but did not submit an offer.
• United Arab Emirates Damen had submitted an offer for the s. It lost to a corvette based on the Italian.
• Oman had an interest in buying four Sigma corvettes/frigates in March 2011. The Dutch queen Beatrix planned a state visit to Oman, one of the reasons for the visit being the potential sale of the ships to the Royal Navy of Oman. The official visit was cancelled due to the unrest in Oman at the time, although the queen did go to an unofficial dinner with the Sultan of Oman. The official visit took place later in January 2012. During the first visit to Oman, the Royal Netherlands Navy sent its air defence warfare frigate to Muscat. In April 2012 it was announced that they lost to the Singaporean by ST Engineering. Damen had offered the Sigma 7513.

  Indonesian Navy variants

SIGMA 9113

SIGMA 10514

Moroccan Navy variants

Romanian Navy variant

Mexican Navy variant

Ships of class