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IT1 SEP EXAM 2018 > NAVEDTRA 14189A, NAVY ELECTRICITY AND ELECTRONICS TRAINING SERIES. MODULE-17 RADIO-FREQUENCY COMMUNICATIONS PRINCIPLES > Flashcards

NAVEDTRA 14189A, NAVY ELECTRICITY AND ELECTRONICS TRAINING SERIES. MODULE-17 RADIO-FREQUENCY COMMUNICATIONS PRINCIPLES Flashcards

1
Q

What year was the first official naval radio message sent from ship to shore?

A

1899

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2
Q

What year was the first radiotelephone used between ships?

A

1916

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3
Q

In what year were the first superheterodyne receivers installed in the fleet?

A

1931

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4
Q

In what year were the first successful radio teletypewriter transmissions between ships completed?

A

1944

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5
Q

In what year did the first successful use of radiophoto (facsimile) occur?

A

1945

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6
Q

What refers to communications over a distance and includes any transmission, emission, or reception of signs, signals, writings, images, or sounds?

A

Telecommunications

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7
Q

What is the most important method the Navy has of communicating between widely separated forces?

A

Radio

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8
Q

What was the first means of radio communications that had military and commercial importance?

A

Radiotelegraphy

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9
Q

Line-of-sight characteristics limit the usual range of radiotelephone from how many miles?

A

20 to 25

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10
Q

The Navy uses radio teletypewriter (rtty) mainly for high-speed automatic communications across ocean areas and has a normal speed of operation of how many words per minute?

A

100

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11
Q

What is the process used to transmit photographs, charts, and other graphic information electronically?

A

Facsimile (fax)

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12
Q

What is a combination of sets, units, assemblies, subassemblies, and parts joined together to perform a specific operational function or several functions?

A

Systems

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13
Q

What consists of a unit or units and the assemblies, subassemblies, and parts connected or associated together to perform a specific function?

A

Set

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14
Q

What is a collection of units, assemblies, subassemblies, and parts?

A

Group

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15
Q

What is an assembly or any combination of parts, subassemblies, and assemblies mounted together?

A

Unit

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16
Q

What is a number of parts or subassemblies, or any combination thereof, joined together to perform a specific function?

A

Assembly

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17
Q

What is one component or two or more components joined together?

A

Part

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18
Q

What is the frequency range for the extremely high frequency (EHF) band?

A

30 GHz-300 GHz

19
Q

What is the frequency range for the super high frequency (SHF) band?

A

3 GHz-30 GHz

20
Q

What is the frequency range for the ultra high frequency (UHF) band?

A

300 MHz - 3 GHz

21
Q

What is the frequency range for the very high frequency (VHF) band?

A

30 MHz - 300 MHz

22
Q

What is the frequency range for the high frequency (HF) band?

A

3 MHz - 30 MHz

23
Q

What is the frequency range for the medium frequency (MF) band?

A

300 KHz - 3 MHz

24
Q

What is the frequency range for the very low frequency (VLF) band?

A

3 KHz - 30 KHz

25
Q

What is the frequency range for the extremely low frequency (ELF) band?

A

Up to 300 Hz

26
Q

What band has the ability to penetrate ocean depths to several hundred feet with little signal loss?

A

ELF

27
Q

What type of transmission is normally considered a broadcast, that is, one-way transmission, no reply required?

A

VLF

28
Q

What systems are established to communicate over long-distance trunks or links between fixed terminals?

A

Point-to-point

29
Q

What is normally a message circuit between two points that are both switching centers or individual message distribution points?

A

Trunk

30
Q

What is a transmitter-receiver system connecting two locations?

A

Link

31
Q

Frequencies above what are not normally refracted by the atmosphere and ground-wave range is minimal?

A

30 megahertz

32
Q

The naval communications system is broken down into what groups?

A

Strategic and tactical

33
Q

What type of communications are usually limited to a specific area of operations and are used to direct or report the movement of specific forces?

A

Tactical

34
Q

What mode is a method of operation in which telecommunications between stations take place simultaneously in both directions using two separate frequencies?

A

Full-Duplex (fdx)

35
Q

What is the type of operation in which one station transmits information on one or more channels directed to more than one station and/or unit?

A

Broadcast (bc)

36
Q

Message traffic is normally sent to the fleet by three methods: broadcast, intercept, and what else?

A

Receipt

37
Q

What combines into a single system all the elements that make up the naval communications system and the Army and Air Force equivalent?

A

DCS

38
Q

What offers rapid, direct interconnection of DoD and certain other government installations through worldwide telephone exchanges?

A

DCS AUTOVON

39
Q

What provides authorized users with a means for exchanging classified information over communications security (COMSEC) circuitry or over other approved circuitry?

A

AUTOSEVOCOM

40
Q

Daily capacity of the AUTODIN system is about how many average-length messages?

A

Five million

41
Q

What was established for the purpose of integrating the critical intelligence communications (CRITICOMM) and the special intelligence communications (SPINTCOMM) networks into a single automated communications network?

A

DSSCS

42
Q

What network provides a voice link between the Chief of Naval Operations (CNO) and all subordinate commands ashore, afloat, and airborne?

A

HICOM

43
Q

What meets our need for a connection between Navy tactical voice systems of the operating forces and the various fixed telephone services ashore?

A

NORATS

IT1 SEP EXAM 2018 (10 decks)

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