Naval units are vessels which demand a greater technological capability since they contain complex electronic and weapons systems. The main units built by SIMA are missile frigates of 2400 tons of displacement, equipped with long-range missiles, and Coast-Guard patrol boats. Currently, these vessels make up the fleet of the Peruvian Navy and are a sample of the high technological level reached by SIMA.
Within the defense and security demands against unlawful actions of smuggling, drug trafficking or terrorism, SIMA equally develops fully-equipped fast ships for different geographical conditions, such as coastal boats, river gunships and speedboats for logistics support.