The larger Mihail Kogălniceanu-class river monitors carry 100 mm guns forward and aft. Their lighter armament includes 30 mm cannon, 14.5 mm machine guns and surface-to-air missiles. The smaller Smârdan-class armoured patrol ships have a single 100 mm gun. The two layouts distinguish the heavier monitors from the more lightly armed vessels operating alongside them.
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Romania's monitors and patrol ships carry different gun batteries
Forward and aft 100 mm guns distinguish the larger monitors from smaller patrol vessels carrying one gun of that calibre.