TY JOUR TI THE SPECIFICATIONS OF UNMANNED AERIAL VEHICLES OF VERTICAL TAKEOFF AND LANDING IN PURPOSE OF FOREST FIRE MONITORING KW monitoring KW fire KW forest KW unmanned aerial vehicles KW vertical takeoff and landing JO Problems of risk management in the technosphere AU Chikitov, Y.I. AU Tarancev, A.A. PY 2014 IS 2014 PB Saint-Petersburg University of State Fire Service of Emercom of Russia