OVERVIEW: The Allende-class Guided Missile FF is a single shaft, steam-powered missile-armed frigate.   

DETAILS:  The Allende-class are ex-US Knox class FFs. These ships were designed primarily as open ocean ASW platforms.  In Mexican service they are used for ASW and patrol duties.

The ASUW weapons suite consists of a 127mm/54 Mk42 gun and potential inclusion of Harpoon SSM using the Mk16 ASROC launcher.  Additionally, four single 12.7mm/90 MG are carried.  4 single 12.7mm/90 MG.  The ASW weapons suite includes 4x 324 Mk32 Torpedo tubes.  One hull (F211) retains the 8x1 RIM-7 Sea Sparrow SAM launcher.

Aviation facilities include a hanger and pad for one  Bo-115 helicopter.

The electronics suite includes an AN/SPS-64(v)9 and AN/SPS-10 Surface Search, an AN/SPS-40B 2D air search and an AN/SPG-53F fire-control radar.  Sonar includes the hull mounted SQS-26CX active/passive sonar. 

SPECIFICATIONS:
Displacement: 	4260 (full)
Speed: 		27 kts max
Engineering: 	2-1200 psi boiler, 1-geared turbine, 1-shaft shaft, 35,000 shp
Range: 		4000 nm @ 22 kts
Complement: 	224

NOTES: IOC 1972 (USN) 1999 (Mexico). Ex-US Knox class.  Units in class: IGNACIO ALLENDE (F211); MARIANO ABASOLO (F212); GUADALUPE VICTORIA (F213); FRANCISCO JAVIER MINA (F214). The purchase of Harpoon Block II ASMs was authorized in 2018, but they are reported to not be for use in the Allende-class.

SOURCES: Jane's Fighting Ships 2015-2016; Combat Fleets of the World 1990/91, pg. 266-67.; 807;  "Allende-class Frigate." Wikipedia, the Free Encyclopedia. Last modified September 30, 2021. https://en.wikipedia.org/wiki/Allende-class_frigate.; "IGNACIO ALLENDE Frigates (1970-1974/1998-2002)." NAVYPEDIA - Fighting Ships of the World. Accessed April 30, 2023. https://www.navypedia.org/ships/mexico/mex_es_ignacio_allende.htm.
