The Uniao is a British built, Brazilian Niteroi Class, modified Vosper Thornycroft Mark 10 frigate. The ship has a displacement 0f 3800 tons, fully loaded. The ship is armed with two twin Aerospatiale Exocet MM38 launchers; two Short Bros Seacat triple anti-air launchers and six 324 mm Plessey STWS-1 (two triple) torpedo tubes taking the Honeywell ...