Perforating Gun Operation & Radio Silence

Radio transmissions from Helicopters in the vicinity of a Perforating Gun (drilling) operations may jeopardize the operation and personnel safety.
These precautions should be taken: Activate NOTAM system, close the Heliport deck and make warning clearly visible to passing Pilots. Post “No Radio” lettering on Heliport according to size requirements (24 Inches High. x 12 Inches Wide.)