ASW

Question 1

Which ASW system is used to increase the capability to detect submarines by evaluation MAD signals and separating submarine anomaly from magnetic noise?

Answer 1

SAD

Sub Anomaly Detector

Question 2

Which ASW system equipment is used to reduce the effects of unwanted magnetic disturbances?

Answer 2

MAD compensator

Question 3

you MUST use special nonferrous tools on what unit of the typical MAD system?

Answer 3

Amplifier power supply

Question 4

Variations in the earths magnetic field strength causing changes in the quantity of light passing through helium gas is the principle of what ASW equipment?

Answer 4

Solid-state magnetomer

Question 5

what term best describes how a state of total balance of magnetic forces around a magnetometer is achieved?

Answer 5

Compensation

Question 6

what term is used to describe magnetic variations is an east-west direction

Answer 6

Dip

Question 7

What SONAR set operational mode produces acoustic pulses that are radiated through the water from the dome projector?

Answer 7

echo ranging

Question 8

what dome unit converts electrical pulses to acoustic pulses?

Answer 8

projector

Question 9

what type of motor is used to raise and lower the sonar dome?

Answer 9

hydraulic

Question 10

what is the maximum number of usable feet of the special purpose cable used to an airborne sonar system?

Answer 10

450 feet

Question 11

what airborne sonar major unit displays target echoes and provides direct readouts of bearing and range information?

Answer 11

Azimuth and range indicator

Question 12

what sonar set operating mode should be used to communicate with similarly equipped helicopters, submarines, or surface vessels?

Answer 12

communicate

Question 13

what sonar set operation mode should be used to search for possible targets without alerting the target?

Answer 13

Passive

Question 14

what sonar set operation mode provides the operator with information useful in determining optimum search depth?

Answer 14

Bathythermograph

Question 15

what principle describes why certain ceramic dielectrics deform when an electric field is applied?

Answer 15

electrostrictive

Question 16

what principle describes why certain crystals produce charges of electricity under mechanical stress?

Answer 16

piezoelectric

Question 17

what principle describes why certain metals shrink or contract when placed in magnetic field?

Answer 17

Magnetostrictive

Question 18

the primary function of a transducer is to…?

Answer 18

transmit underwater sound only.

Question 19

what is the primary function of a hydrophone?

Answer 19

receive underwater sound only

Question 20

what term best describes the change of pitch from a returning echo caused by relative motion between the sound source and the reflective surface?

Answer 20

doppler effect

Question 21

what term best describes a region in seawater where a relatively rapid decrease in temperature occurs?

Answer 21

thermocline

Question 22

what seawater characteristic most often affects the speed of sound in water?

Answer 22

Salinity

Question 23

what characteristic of sound best describes the effect of the speed of sound in seawater changing as the water temperature changes?

Answer 23

Refraction

Question 24

what characteristic of sound best describes why a weak signal is found the further one gets from a point source of sound?

Answer 24

divergence

Question 25

What characteristic of sound best describes an echo?

Answer 25

reverberation

Question 26

What signal strength losses is caused by the effect of water on a sound beam as it travels through water?

Answer 26

Transmission signal

Question 27

What sonobuoys is considered a listen only ASW sonobuoy?

Answer 27

DIFAR

Question 28

What type of information is send via VHF radio signals from the sonobuoy to the deploying aircraft?

Answer 28

Tactile

Question 29

What acronym is used to refer to a weapons system that finds and destroys submarines?

Answer 29

ASW