Term
| What is the NAVAIR 13650/1? |
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Definition
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Term
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Definition
| The first four digits of the National Stock Number; the first two identify commodity group and the last two identify the class within the community group. |
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Term
| What do the first four digits of an NSN represent? |
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Definition
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Term
| What do the last seven digits of an NSN represent? |
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Definition
| National Item Identification Serial Number |
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Term
| What do the 5th - 13th digits of an NSN represent? |
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Definition
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Term
| An interchangable item or suitable substitute capable of performing the same function or functions as the prime item is known as? |
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Definition
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Term
| What are the two reportable codes assigned for SE end items? |
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Definition
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Term
| What do positions 5 & 6 of an NSN represent? |
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Definition
| National Codification Bureau Code |
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Term
| Who is the only authority who can tailor IMRL to a quantity greater than the computed allowance? |
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Definition
| Primary Support Equipment Controlling authority (Primary SECA) |
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Term
| What is the code that identifies and designates the ICP activity exercising supply management over items of SE? |
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Definition
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Term
| What are the 5 digits used by SERMIS to identify a unit's AAI? |
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Definition
| The activity's 5 digit UIC |
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Term
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Definition
| Aircraft Controlling Custodian |
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Term
| The Compensator Group Adapter (CGA) serves what purpose? |
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Definition
| Computerizes the compensation calculation |
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Term
| The fault indicator on the detecting set control labeled 3 indicates a failure in what component? |
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Definition
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Term
| Which type of sonobuoy provides water temperature data? |
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Definition
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Term
| The angle between an imaginary line tangent to the Earth's surface and to the magnetic line of force where it enters the Earth's surface is known by what term? |
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Definition
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Term
| Which statement best describes the effects of divergence on sound waves? |
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Definition
| The wave spreads out and becomes weaker with distance |
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Term
| The OTPI system provides what information to the USW pilot? |
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Definition
| Sonobuoy bearing with respect to aircraft heading |
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Term
| What unit of the ASQ-13F converts sound energy to electrical signals? |
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Definition
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Term
| Under most situations, what type of sonobuoy is best for initial detection? |
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Definition
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Term
| What is the most important factor affecting the speed of a sound in seawater? |
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Definition
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Term
| DICASS sonobuoys are commanded to ping by what source? |
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Definition
| A UHF signal from the USW aircraft |
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Term
| The OTPI system works in conjunction with what other aircraft system? |
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Definition
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Term
| The acronym sonar is derived from what words? |
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Definition
| Sound, navigation, and ranging |
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Term
| The electrical interface between the sonar set units mounted in the helicopter and the submerged sonar transducer is provided by what component of the ASQ-13F dipping sonar set? |
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Definition
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Term
| The maximum range at which a submarine may be detected depends on the intensity of its magnetic anomoly and what other factor? |
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Definition
| The sensitivity of the detector |
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Term
| What are the three magnetic fields relative MAD compensation? |
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Definition
| Transverse, longitudinal, and vertical |
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Term
| What information does a BT sonobuoy provide? |
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Definition
| Water temperature vs depth |
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Term
| If the detectable strength of the magnetic field source has a given value at a given distance and the distance is doubled, the detectable strength of the source at the increased distance will then be how much of its former value? |
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Definition
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Term
| Dipping sonar systems use what type of sonar detection? |
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Definition
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Term
| Which type of sonobuoy is designed for long-range submarine detection in deep water? |
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Definition
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Term
| A LOFAR sonobuoy uses what type of hydrophone? |
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Definition
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Term
| In practice, how many terms are needed to compensate any aircraft satisfactorily? |
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Definition
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Term
| An increase in the salinity of seawater has what effect on the sound wave? |
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Definition
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Term
| Any noise or disturbance originating in the aircraft or its equipment that could produce a signal on a MAD equipment recorder is known by what term? |
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Definition
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Term
| What fault indicator on the MAD control box indicates an amplifier failure? |
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Definition
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Term
| What are the three methods of deploying a sonobuoy? |
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Definition
| Pneumatic, free-fall, and cartridge |
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Term
| Compensation for an aircraft's dc magnetic field is accomplished by using how many electromagnetic loops? |
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Definition
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Term
| In the ASQ-81 solid-state MAD detector, the energy level of the electrons is increased, and the atoms are properly oriented by what procedure? |
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Definition
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Term
| When electrons are excited to an energy level that is higher in energy and longer lasting in duration, this energy state is known as what type of energy state? |
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Definition
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Term
| What are the main components of a basic MAD detecting set? |
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Definition
| Magnetic detector, amplifier-power supply, and detecting set control |
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Term
| Sonobuoys equipped with an EFS system have what capability? |
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Definition
| The capability of selecting channel, life and depth settings |
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Term
| What are the two special-purpose sonobuoys? |
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Definition
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Term
| What is the approximate warm-up time for the AN/ASQ-81 MAD system |
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Definition
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Term
| What component of a helium magnetometer detects the energy level changes of the helium atoms and produces an electrical output? |
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Definition
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Term
| Maneuver noises caused by eddy current flow can be minimized by taking what action? |
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Definition
| Making slow aircraft maneuvers |
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Term
| What type of naval aircraft employs the AN/ASQ-13F dipping sonar system? |
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Definition
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Term
| What information can a DIFAR sonobuoy provide that a LOFAR sonobuoy cannot? |
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Definition
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Term
| Which of the following sea floor surfaces has the least amount of signal loss? |
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Definition
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Term
| How are sonobuoys activated? |
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Definition
| Saltwater battery activation |
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Term
| What happens to the sonobuoy after the battery dies? |
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Definition
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Term
| Magnetic noise sources fall into what two major categories? |
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Definition
| DC circuit noise and maneuver noise |
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Term
| How many helium absorption cell/IR detector pairs are contained in the detector element? |
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Definition
| Six (6) absorption cell/IR detector pairs |
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Term
| The OTPI system provides what information to the USW pilot? |
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Definition
| Sonobuoy bearing information with respect to aircraft heading |
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Term
| What is the purpose of magnetic compensation? |
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Definition
| To reduce the effects of unwanted magnetic disturbances |
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Term
| Sound waves in seawater travel how many times faster than sound waves in air? |
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Definition
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Term
| What are the functions of the ASA-64/ASA-71 SAD system? |
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Definition
| The ASA-64/ASA-71 SAD system separates submarine anomalies from magnetic noise and provides visual and audio indications that a submarine contact has been made |
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Term
| What component or components of a helium magnetometer detect the energy level changes of the helium atoms and produces an electrical output? |
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Definition
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Term
| Angles of change in the Earth's natural magnetic field in the east-west direction is known by what term? |
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Definition
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Term
| On a dipping sonar system, what component generates and transmits sound energy into the water? |
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Definition
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Term
| What distinct advantage does a dipping sonar have over a sonobuoy based system? |
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Definition
| Operator control of the search depth |
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Term
| Acoustic data received from a sonobuoy is transmitted to the sonobuoy receiver using what frequency band and what type of modulation? |
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Definition
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Term
| The ECA of the AN/ASA-65 sends compensation currents to what component? |
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Definition
| MAD boom compensation coils |
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Term
| Sonobuoy descent-retarding devices are necessary for what reason? |
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Definition
| To reduce water entry shock |
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Term
| What is the minimum number of sonobuoys normally deployed during a USW mission? |
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Definition
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Term
| Any magnetic field may be defined in terms of what number of axial coordinates? |
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Definition
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Term
| Multiple reflections of a sound wave is referred to by what term? |
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Definition
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Term
| The signals between the magnetic detector and the amplifier-power supply are transmitted through what type of cable? |
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Definition
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Term
| The compensation of MAD equipment for magnetic noise is usually performed at what location? |
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Definition
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Term
| Signal strength lost as sound waves travel through water is known by what term? |
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Definition
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Term
| Magnetic field terms that are designated by two capital letters, such as TT, are what type of terms? |
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Definition
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Term
| DICASS sonobuoys operate on the same principle as what other type of electronic system? |
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Definition
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Term
| A submerged sonar transducer is used to transmit and receive voice signals to and from other USW helicopters, submarines, or similarly equipped surface ships during what ASQ-13F mode of operation? |
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Definition
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Term
| In addition to active and passive sonar modes, a dipping sonar provides what other information? |
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Definition
| Communications and water temperature |
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Term
| What are the two main factors that affect the velocity of sound in seawater? |
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Definition
| The temperature and salinity of the water |
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Term
| What component of the sonobuoy-based sonar system extracts acoustic target information from both active and passive sonobuoys? |
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Definition
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Term
| Sonobuoys that transmit an acoustic pulse and detect a resulting echo are classified as what type of sonobuoy? |
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Definition
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Term
| An EER sonobuoy is typically used in conjunction with what other sonobuoy for long-range detection? |
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Definition
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Term
| Sonobuoys equipped with an EFS system have what capabilities? |
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Definition
| Selectable channel, life, and depth settings |
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Term
| The Larmor frequency of electrons varies with magnetic field intensity at the rate of how many Hz per a? |
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Definition
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Term
| The ARR 84 sonobuoy receiver is used in the SH-60 series helicopter for what reason? |
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Definition
| Accommodation of weight restrictions |
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Term
| The CGA performs what function? |
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Definition
| Calculates compensation data |
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Term
| What is the purpose of the submarine anomaly detector (SAD) system? |
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Definition
| Separates submarine anomalies from magnetic noise |
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Term
| When maintenance is performed on or near the magnetometer head, what type of tools must be used? |
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Definition
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Term
| According to the Doppler effect, when the source of a sound wave is moving away from the receiver, what apparent change in the sound wave takes place? |
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Definition
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Term
| The gamma, the measure of magnetic intensity, is symbolized by what Greek letter? |
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Definition
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Term
| Which sea state causes the greatest amount of absorption? |
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Definition
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Term
| What is the purpose of magnetic compensation in USW aircraft? |
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Definition
| To provide a magnetically clean environment |
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Term
| Sonobuoys that transmit an acoustic pulse and detect a resulting echo are classified as what type of sonobuoy? |
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Definition
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Term
| A sound wave traveling from an area of warm water into an area of cold water will be affected in what way? |
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Definition
| It will bend toward the area of cold water |
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Term
| The ARR-78 sonobuoy receiver is capable of simultaneous reception of up to what number of sonobuoys? |
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Definition
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Term
| What are the three most common propagation paths for sound waves? |
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Definition
| Direct, bottom bounce, and convergance |
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Term
| A sonar transducer can be compared to which item? |
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Definition
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Term
| The natural spin axis wobble rate of a particular atom is referred to by what term? |
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Definition
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