[2] The corvettes are powered by two Caterpillar 3616 V16 diesel engines turning two shafts creating 9,242 kilowatts (12,394 bhp) total.

[2] 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.

The corvettes are armed with one 57-millimetre (2.2 in) Mk3 naval gun on the fore deck to engage air and surface targets.

The ships carry an 11 m (36 ft) interceptor craft capable of 50 knots (93 km/h; 58 mph).

[2][a] In 2017, following an earthquake, Romero was dispatched to Salina Cruz with humanitarian relief supplies and supported the local population as it recovered.