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31 Cards in this Set
- Front
- Back
What year was the first official naval radio message sent from ship toshore
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1899
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What year was the first radiotelephone used between ships?
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1916
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In what year were the first super-heterodyne receivers installed in thefleet?
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1931
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In what year were the first successful radio teletypewriter transmissionsbetween ships completed?
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1944
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In what year did the first successful use of radiophoto (facsimile)occur?
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1945
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What refers to communications over a distance and includes anytransmission, emission, or reception of signs, signals, writings, images, orsounds?
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Telecommunications
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What is the most important method the Navy has of communicatingbetween widely separated forces?
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Radio
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What was the first means of radio communications that had militaryand commercial importance?
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Radiotelegraphy
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Line-of-sight characteristics limit the usual range of radiotelephonefrom how many miles?
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20 to 25
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The Navy uses radio teletypewriter (rtty) mainly for high-speedautomatic communications across ocean areas and has a normal speed ofoperation of how many words per minute?
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100 |
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What is the process used to transmit photographs, charts, and othergraphic information electronically? |
Facsimile (fax) |
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What is a combination of sets, units, assemblies, subassemblies, andparts joined together to perform a specific operational function or severalfunctions? |
System |
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What consists of a unit or units and the assemblies, subassemblies,and parts connected or associated together to perform a specific function? |
Set |
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What is a collection of units, assemblies, subassemblies, and parts? |
Group |
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What is an assembly or any combination of parts, subassemblies, andassemblies mounted together? |
Unit |
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What is a number of parts or subassemblies, or any combinationthereof, joined together to perform a specific function? |
Assembly |
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What is one component or two or more components joined together? |
Part |
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What is the frequency range for the extremely high frequency (EHF)band? |
30 GHZ - 300 GHz |
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What is the frequency range for the super high frequency (SHF) band? |
3 GHZ - 30 GHz |
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What is the frequency range for the ultra high frequency (UHF) band? |
300 MHZ - 3 GHz |
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What is the frequency range for the very high frequency (VHF) band? |
30 MHZ - 300 MHz |
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What is the frequency range for the high frequency (HF) band? |
3 MHZ - 30 MHz |
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What is the frequency range for the medium frequency (MF) band? |
300 KHZ - 3 MHz |
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What is the frequency range for the low frequency (LF) band? |
30 KHZ - 300 KHz |
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What is the frequency range for the very low frequency (VLF) band? |
3 KHZ - 30 KHz |
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What is the frequency range for the extremely low frequency (ELF)band? |
Up to 300 Hz |
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What band has the ability to penetrate ocean depths to several hundredfeet with little signal loss? |
ELF |
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What type of transmission is normally considered a broadcast, that is,one-way transmission, no reply required? |
VLF |
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What systems are established to communicate over long- distancetrunks or links between fixed terminals? |
Point-to-point |
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What is normally a message circuit between two points that are bothswitching centers or individual message distribution points? |
Trunk |
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What is a transmitter-receiver system connecting two locations?
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Link
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