sna pest Jassie200: pir 5 protection may be afforded by tying then down to sand bags or piling sand bags around thoir landing gear. b. Vehicles: (1) c, Secure all vehicles. Tugs and power units will be secured down blast and at a safe distance from the parked aircraft. All windows will remain open. Other Organizational Materiel: (1) Every effort will be made to secure all items of organi- zational materiel in such a mannor that thoy do not constitute a hazard, Maintenance stands should be secured in a manner similar to that specified for vchiclos. ad. Unit Areas: (1) (2) A careful examination of work and living areas and arcas adjacent thereto should be conducted to insure the removal of all debris and light or loose objects which might be dislodged. Thorough policing by all personnel will reduce the possibility of loose or movable objects becoming missiles by the action of blast or high wind. Special attention should be given to securing objcéts with sharp, cutting or jagged edges, o.g., large sheots of metal, glass, wooden planking, etc, ce. Building and Tents: (1) (2) (3) All windows, doors and tent flaps will be secured in the open position to allow for rapid equalization of pressure, Hangar doors will be open and precautions should bo taken to prevent slipoage. A11 movables should be removed from the tops of desks and furniture. Main powor switches which control electricity used in tents will be placed in the "OFF" position and will remain off until all danger has passed. (4) All buildings will bo evacuated of porsonnel during detonation, except for the A0C. 3. SIREN SIGNALS: a. Before the Shot: (1) Shot Time Minus 5 Minutes: (a) (2) In the ovent of siren failure, the fire engine whistle will be used. Shot Time Minus 1 Minute: (a) TASK GROUP 7,4 Five (5) siron blasts. OPRS ORDER NO, 5-52 ANNEX Z, APNDX i Three (3) siren blasts. ge yon oFOF go? 9 gos gor a ates00 aKa oP