Which EMCON level states that no emitters are to be used unless specifically authorized by the plan supported?

• A. EMCON 1
• B. EMCON 2
• C. EMCON 3
• D. EMCON 4

Answer: (D)

Limiting electromagnetic emissions is about reducing signature and vulnerability. EMCON levels control which equipment may radiate and under what authorization. When no emitters are to be used unless the plan specifically authorizes it, you’re in the most restrictive setting: all emitters are shut down and only those explicitly allowed by the mission plan may be used. This minimizes detection and targeting risk in sensitive operations, which is why EMCON 4 is the correct level for that condition. The lower levels permit certain emitters to operate with restrictions or automatic allowances, making them less restrictive than EMCON 4.