{| |} The Techno-Sud Vigilant is a small UAV helicopter developed in France in the 1990s for reconnaissance and surveillance applications. It is a helicopter of conventional main-tail rotor configuration, and powered by a 9 kW (12 hp) two-stroke engine. The Vigilant is marketed by Thales, and is being sold to both military and civilian users. Civilian users have accounted for the bulk of sales, using it for applications such as security or environmental monitoring.