Which distance is the Inmarsat radiation hazard referencing for personnel?

• A. 15 ft
• B. 20 ft
• C. 25 ft
• D. 10 ft

Answer: (A)

RF exposure safety around transmitting equipment uses a defined hazard distance—the point at which RF fields could approach regulatory exposure limits for personnel. For the Inmarsat system in this context, the standard reference distance for personnel is fifteen feet. This value is chosen so that, at typical operating power and frequency, anyone beyond this radius remains within allowed exposure limits, providing a clear, practical boundary for safe operation. Ten feet would place someone inside the hazard region under many conditions, while twenty or twenty-five feet would be more conservative than the documented reference.