ARM Romero, also referred to as ARM Matias Romero, is a offshore patrol vessel of the Mexican Navy. The ship was constructed at Salina Cruz Shipyard in Salina Cruz, Oaxaca, with Romero being launched on 17 September 1999 and entering service the same day.
The Sierra class as built had a full load displacement of 1344order=flipNaNorder=flip and measured 70.4m (231feet) long with a beam of and a draught of . According to the Mexican Navy, the vessels have a length of 75.15m (246.56feet), a beam of, a draught of and a normal displacement of . The corvettes are powered by two Caterpillar 3616 V16 diesel engines turning two shafts creating 12394lk=onNaNlk=on total. This gave the vessels a speed of 18kn or . The vessels have two and one generators for power production.
The Sierra class mount a Saab EOS 450 optronic director for fire control, and radars operating on the E/F and I-bands for navigation, surface and air search. They are equipped with the Alenia 2 combat data system. These ships have an aft flight deck and hangar for one MBB Bo 105C helicopter. The corvettes are armed with one 57adj=onNaNadj=on Mk3 naval gun on the fore deck to engage air and surface targets. Romero alone in the class is also equipped with an SA-N-10 surface-to-air missile. The ships carry an interceptor craft capable of . The corvettes have a complement of 75 including 10 officers.
The ship was constructed at Salina Cruz Shipyard in Salina Cruz, Oaxaca, Mexico. The vessel was laid down on 23 July 1998 and launched on 17 September 1999. The ship was commissioned into Mexican Navy service on 17 September 1999. In 2017, following an earthquake, Romero was dispatched to Salina Cruz with humanitarian relief supplies and supported the local population as it recovered.[1]