sentences:  The surplus helicopters, obtained from the U.S. Army, are referred to as "Firehawks" and have been modified for crew transport, patient transport, and to carry water-dropping belly tanks.They provide increased speed (160 miles per hour) and water carrying capacity (1,000 gallons) over the existing fleet.In addition to fire fighting missions, the Hueys and Firehawks are used for search and rescue, emergency medical services, marijuana eradication and surveillance.