The ships are armed with two 6-tubed anti-submarine mortar launchers. The earlier boats are fitted with two manually operated twin-barrel 37 mm guns, but they have been replaced by two automatic 37 mm guns on the later variants.
The vessels are equipped with anti-submarine defense systems, featuring two 6-tubed launchers. The earlier units were armed with two single-barrel 37 mm guns, but they have been upgraded to dual automatic 37 mm guns on the newer versions.