SONAR Flashcards
What are the two types of sonar?
Active
Passive
What does sonar stand for?
Sound Navigation and ranging
What does active sonar read?
Range and bearing
What does passive sonar read?
Bearing. Listen only
What is AN/SQS-53C?
Hull mounted sonar
What type of sonar system is SQS-53C? What is the primary system?
Active and passive.
Primary: Active
How much gallon and what type of water is in sonar dome?
26,000 fresh water
What is the sonar dome pressurized with?
Fireman
How many transducers are in SQS-53C?
576 (72 staves and 8 rows)
If there is a dome casualty what must the ship do?
Slow down to 5 knots and head back to port
What does MFTA stand for?
Multi Function Towed Array
Is MFTA active or passive?
Passive
How long is MFTA cable scope? And how much is deployed?
5,600 feet
5,200 feet deployed
How long is MFTA array?
610 ft
How long is MFTA drogue?
150 feet
What stables the array as it travels thru the water?
The drogue
How many MFTA modules are there?
7
What is the array filled with?
ISOPAR
What does ISOPAR do for the array?
Gives it neutral buoyancy
What is MFTA deployment speed?
3-15 knots
What is MFTA retrieval speed?
10-15 knots
What is MFTA max tow speed?
32 knots
How many sonar buoys are there and what are they called
3
DIFAR (Pointer) AN/SSQ-53
DICASS (Cadillac) SSQ-62
VLAD (TOTEM POLE) SSQ-77
What is SSQ-53 also called?
DIFAR (Pointer)
is DIFAR active or passive?
Passive
What is SSQ-62 also called?
DICASS (Cadillac)
Is DICASS Buoy active or passive?
Active
What is SSQ-77 also called?
VLAD (Totem pole)
Is VLAD active or passive?
Passive
What does DIFAR stand for?
Directional Low Frequency Analysis Recording
What does DICASS stand for?
Directional Command Activated Sonar System
What does VLAD stand for?
Vertical Line Array DIFAR
What system is sonar buoys used as?
Re-detection
What is the ARR-75?
How many buoys can process?
Line of sight receive only antenna
4 passive 1 active
How many buoys can the helio process through SQR-4 Via HAWKLINK?
8
How many sonarbuoys can the helio carry
25
What is a two-way encrypted data and voice comms from ship to helio and helio to ship?
HAWKLINK
What does Hawklink and SQR-4 increase for sonarbuoys processing?
RANGE
All info collected from sonar buoys is processed and displayed on what?
SCFS
What does SCFS stand for?
Surface common Airborne undersea warfare sensor system functional segment
What is MK 32?
Surface Vessel Torpedo Tube (SVTT)
Where are SVTT tubes located and how many on each side?
Port and STBD mid ships.
Three on each side
Is the SVTT a offensive or defensive weapon system?
Defensive
What kind of torpedoes can the MK 32 fire?
MK 46 and MK 54
What is the active range for AN/SQS-53C?
80,000 yards
What is AN/SQS-53C brevity code?
Lance Searcher
What is MFTA brevity code?
Serpant
What degree are MK 32 tubes pointed before firing?
45 degrees
What kind of air is used to fire the torpedoes?
HP air
What are the flask charged for the MK32?
1500-1600 psi
Where can the torpedoes be fired from?
CSER 3 annex, CIC, or locally at tubes
What is used to fire torpedoes in CSER 3 annex?
TSP(Torpedo Setting Panel)
What is used to fire the torpedoes in CIC?
UCFS
What is MK 41?
Where is it located at?
VLS (Vertical launching system)
Aft missile deck and forecastle
Where can MK 41 be fired from and using what?
CIC USING UCFS
What is MK 46?
Thermal torpedo
What are two modes of MK 46?
Run-out(snake search)
No run out (circle search)
How many pounds is the high explosive bulk charge warhead?
98 lbs of PBXN 103
What type of fuel does the MK 46 use?
Otto fuel 2
How does Otto fuel 2 keep burning?
Creates its own oxygen
What does Otto fuel smell like and what color is it?
Roasted almonds
Red-orange
Where is the spilled kit located for the Otto fuel?
Outside CCS
What type of torpedo is the MK 54 ?
Hybrid thermal torpedo
What is the min and max range for MK 46?
Min 3,500 yds
Max 8,000 yds
How many pounds is the high explosive shaped charge warhead for MK 54?
64 lbs of PBXN110
What are the two modes of MK 54?
Directed(snake search)
NON DIRECTED (circle search)
What is the min and max range of the MK 54?
Min 3,500 yds
Max 8,000 yds
What does VLA stand for?
Vertical launch ASROC(anti submarine rocket)
What is the booster drop zone for VLA?
2,500- 5000 yds
What is the min and max range for VLA?
Min 3,000 yds
Max 18,000 yds
What is the brevity code for VLA?
Bassett
What are sonars air assets?
MH-60R
P-3 Orion
P-8 Poseidon
How many buoys can the MH-60R take off with and many can it return with?
Take off with 3 l
Land with only 2
How many buoys can the MH-60R carry?
25
What type of weapon system is the MH-60R? Offensive or defensive
Offensive
How many buoys can the P-3 Orion carry?
84
What is the P-3 Orion?
Long range ASW aircraft that can assist the ship
How many buoys can the P-8 Poseidon carry?
120 buoys
What is the P-8 Poseidon and what can it do that the P-3 can’t
Long range ASW aircraft. Can stay in the air longer than p-3
What is the AN/SLQ-25C other name?
NIXIE (fanfare)
What is nixie original name?
AN/SLQ-25c
What is nixie (AN/SLQ-25C) primary function?
Torpedo countermeasure.
What type of torpedoes does the nixie protect the ship from?
Acoustic-homing and wake homing torpedoes
How many towed bodies does the nixie have and what are the bodies called?
Where are they located?
Two towed bodies
FISH
Port and STBD side
How many feet is nixie cable scope?
2,100 feet
What is the max deployable length for nixie?
2,000 feet
How many feet does the nixie stay on the winch?
100 feet
What are the 6 modes for nixie?
Swept Noise Alternate Pulse Random Broadband
What are the two sub modes for nixie?
Magnetic Influenced Countermeasure (MICM
Reactive Magnetic Countermeasure (RMC)
What does MICM stand for?
Magnetic influenced countermeasure
What does RMC stand for?
Reactive Magnetic Countermeasure
What is AN/WQC-2A brevity code?
Gertrude. Uncle joe on Gertrude
What does AN/WQC-2A do?
Provides two way unencrypted voice communications
Example: ship to ship, ship to sub, sub to sub
Where is unit 3 of AN/WQC-2A located?
Sonar 2
Where is unit 2 of AN/WQC-2A located?
Bridge
What is AN/WQC-6 brevity code?
Probe alert
What does AN/WQC-6 provide?
One way encrypted communications
Example: ship to sub
What does AN/UQN-4A provide?
Provides depth beneath the keel
What does AN/UQN-4A calculated and how?
Calculates depth by sending out small active sonar transmissions
How many and where are AN/UQN-4A repeaters?
3
Located in CIC, Bridge, Chart room
Sound speed is how many feet per second underwater?
5000 fps
Sound speed helps determine what thru the water?
Propagates (moves)
How many factors effects sound speed? And what are they?
3
Temperature
Salinity
Pressure
What type of probe is XBT?
Temperature probe
What does XBT stand for?
Expendable Bathythermograph
How many feet does the XBT fall?
And how long does it take it to fall
1500 ft in 90 sec
What does the front probe of the XBT do?
Measure resistance
All the data collected by the XBT gives a what?
Sound speed profile
What is Snell’s law?
Sound goes in the path least resistant
What does PMAP stand for?
Protective Measures Assessment Protocol
What is PMAP used for?
Used for going active or doing gun shoots to help protect marine life
How many functional segments does the AN/SQQ89A (v) have?
15
What does ACIFS stand for?
What does it do?
Acoustic Intercept Functional Segment
Allows us to see when other ships or subs are using active sonar
What does BFFS stand for?
What is it used for?
Beam Forming Functional Segment
Gives us Status of our hull and towed array
What does HPPFS stand for?
What is used for?
Hull passive processing functional segment.
Used for hull passive sonar
What does MFAFS stand for?
What is it used for?
Mid-Frequency Active Functional Segment.
Used to display hull active sonar
What does PAFS stand for?
What is it used for?
Passive acoustic functional segment
Used to display the info from MFTA
What does RECFS stand for?
What is it used for?
Recorder Functional segment.
Used to record what is on the sonar suite consoles
What does SPPFS stand for?
What is it used for?
Sensor performance prediction functional segment.
Used to give environmental data
What does SUPFS stand for?
Supportability Functional segment.
What does TRAFS stand for?
What is it used for?
Torpedo Recognition and Alertment functional segment.
Alert sonar when senses a torpedo
What does UCFS stand for?
What is it used for?
Undersea Warfare Control Functional Segment.
Firing VLA and torpedoes
Undersea warfare consist of
Mine warfare, anti- submarine warfare
What is the technical name for hull mounted sonar?
AN/SQS-53C
What is run out other name?
Snake search
What is no run out also called?
Circle search
What is Gertrude real name?
AN/WQC-2A
What gives depth beneath the keel?
UQN-4A
What is NIXIE brevity code ?
Fanfare
What company made Sonar Hull mounted?
BF Goodwrench
What functional segment allows us to see when other ships or subs are using active sonar?
ACIFS (Acoustic Intercept Functional Segment)
What functional segment gives us the status of our hull and towed array?
BFFS(Beam Forming Functional segment)
What functional segment is used for hull passive sonar?
HPPFS (Hull Passive Processing Functional Segment)
What functional segment uses to display hull active sonar?
MFAFS(Mid-Frequency Active Functional segment)
What functional segment uses to display the info from MFTA?
PAFS(Passive Acoustic Functional Segment)
What functional segment records what is on the sonar Suite consoles?
RECFS (Recorder Functional Segment)
What function segment processes sonobuoy data?
Surface Common Airborne Undersea warfare sensor system functional Segment SCFS
What functional segment gives environmental?
SPPFS (Sensor Performance Prediction Functional Segments)
What functional segment is the central source of technical info and training info witchin the USW combat system?
SUPFS(Supportability Functional Segment)
What functional segment uses to alert sonar when the system senses that a torpedo may be present?
TRAFS(Torpedo Recognition and Alertment Functional Segment)
What functional segment uses to fire VLA’s and torpedoes?
UCFS(Undersea warfare Control functional segment)
What type of data does XBT send ?
Temperature vs Depth
What transducers so?
Convert acoustic energy to an electrical signal and also electrical signal into acoustic energy
What does XBT give us after all data collected?
Sound speed profile