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The Sierra-class oceanic patrol corvettes are intended mainly for interception of drug smugglers, Exclusive Economic Zone (EEZ) patrol, and countering terrorism. The class comprises four ships with the lead ship ARM (Armada de la Republica Mexicana/Mexican Republic Navy) Sierra (P-141) commissioned by the Mexican Navy

Mexican Navy

The Mexican Navy is the naval branch of the Mexican military responsible for conducting naval operations. Its stated mission is "to use the naval force of the federation for the exterior defense, and to help with internal order". The Navy consists of about 56,000 men and women plus reserves, over...

 in 2000.

Originally, this project was designated Holzinger 2000 because it is a further development of Mexican Navy Holzinger-class ships introduced in the early 1990s. These ships represent modern shipbuilding with an aft flight deck and hangar for one MBB BO-105C helicopter, stealth features and one 57mm Mk2 naval gun in the fore deck to engage air and surface targets.

Ships

• ARM Sierra (P-141)
• ARM Juarez (P-142) - Taken out of service after a fire incident.
• ARM Prieto (P-143)
• ARM Romero
  ARM Romero
  ARM Romero is a Sierra class Offshore Patrol Vessel of the Mexican Navy....
  
  (P-144)