Underwood and Greenhalgh

The Oliver Hazard Perry-class guided-missile frigate USS Underwood (FFG 36), foreground, conducts tactical maneuvers with the Brazilian frigate BNS Greenhalgh (F-46). Underwood and Greenhalgh are group sailing to Key West, Fla. for UNITAS Atlantic 53-2012. (U.S. Navy photo by Mass Communication Specialist 2nd Class Stuart Phillips/Released)

The Oliver Hazard Perry-class guided-missile frigate USS Underwood (FFG 36), foreground, conducts tactical maneuvers with the Brazilian frigate BNS Greenhalgh (F-46). Underwood and Greenhalgh are group sailing to Key West, Fla. for UNITAS Atlantic 53-2012. (U.S. Navy photo by Mass Communication Specialist 2nd Class Stuart Phillips/Released)

BNS Greenhalgh is a former British Type 22 frigate (the former HMS Broadsword) and a Falklands War veteran.