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18 Cards in this Set
- Front
- Back
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Radio telephone (rt) |
Used for tactical & administrative comms by ship and aircraft |
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Communications status board |
Indicates radio circuit assignments, frequencies, radio remote station channelisation and use. |
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Atmospheric condition |
Usually have very little effect on radar they're the most common atmospheric conditions to radar |
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Refraction |
The bending of waves due to changes in density of the medium through which they're passing in termed refraction. |
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Diffraction |
A wave bends around the edges of an object and penetrates into the shadow region behind it |
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Attenuation |
The scattering and absorption of energy as it passes though the medium |
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Ducting/trapping |
The temperature and moisture contact of the atmosphere normally decrease with height above the surface of the earth |
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Sea return |
Rf energy is reflected back to the ship causing false target contact |
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Weather |
If precipitation is present it will show rf energy |
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Flash (z) |
Process voice or radio messages as fast as humanly possible under 10 minutes. Normally dealing with emergency action messages |
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Immediate (o) |
Process voice or radio messages within30 minutes or less |
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Priority |
Process voice or radio messages within 3 hours or less. The highest precedence assigned to admin messages |
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Routine |
Process voice or radio messages within 6 hours or less |
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minimize |
The condition imposed in a specific communications area to reduce voice and record traffic so that essential traffic can be efficiently handled. |
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Essential elements of friendly information (eefi) |
List of procedures and developed to identify specific items of information which, if acquired by an adversary, will degrade security of military special operation, special projects, etc. |
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Bead window |
The code word in real time procedure brings to the immediate attention of circuit operator the fact that an Eefi disclosure Has occured |
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Gingerbread |
Codeword used to warn operators of spoofing on the net by giving orders using a borrowed call sign from a friendly unit or by passing deceitful messages |
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Emcon |
Selective control conditions of emitted electromagnetic or acoustic energy |
