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£&£81 > End Of Applied > Flashcards

End Of Applied Flashcards

1
Q

What are the two types of beam forming in DIFAR

A

Cardioid and limicon

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2
Q

Passive sonar equation

A

SE=SL-PL-AN-(RD)-DI

DI = 0 for p8

RD = 6.5 for p8

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3
Q

FOM

A

FOM=SL-AN-RD

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4
Q

What do you get from wentz Knutson curves

A

Predicted AN

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5
Q

What do you get form mimic wader curves

A

AN based on hz and depths

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6
Q

3 factors effecting velocity

A

Temp 6ft per 1f

Salinity 4.6ft per 1 part per thousand

Pressure 1.6ft per 100ft

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7
Q

Sound propagation paths in water

A

Surface duct, direct path, bottom bounce, deep sound channel, CZ

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8
Q

3 types of spreading and db loss

A

Cylindrical 3dB

Spherical 6db

Dipolar 12db

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9
Q

3 types of spreading and db loss

A

Cylindrical 3dB

Spherical 6db

Dipolar 12db

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10
Q

3 layer ocean model

A

Mixed layer

Thermocline

Deep water

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11
Q

Define sound

A

The periodic variation in pressure in an elastic medium

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12
Q

What is SLD

A

The maximum velocity in the first 1000ft

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13
Q

HALT

A

High away low towards

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14
Q

Define ocean fronts

A

Boundary between two distinct water masses

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15
Q

3 factors effecting detectability

A

Resolution, integration normalisation

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16
Q

Merch rpm bracket

A

Small 210+ medium 130-210
Large 50-90

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17
Q

Two types of AN

A

Manmade and natural

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18
Q

What is ANR and what does it do

A

Active noise reduction

Suppresses unwanted noise to focus on target noise

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19
Q

Equipment in the LSJ pocket

A

5X 50ml water
16mm flares
First aid kit
Heliograph
Razor blades
Ground air codes
Foil blanket
LMD
Batteries
Cutter

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20
Q

Components of LSJ

A

2 oral inflation tubes
Antenna
Water activated lights
Whistle
Lifeline and retaining toggle
Lifting brackets
Reflecting tape

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21
Q

LMD modes

A

Strobe, blue, infrared

22
Q

EPLB modes

A

On, armed, off, test

23
Q

When would the EPLB automatically activate

A

11g impact

24
Q

EPLB Freq

A

121.5, 243, 406 mhz

25
Q

How to manually inflate LSJ

A

2 oral inflation tubes

26
Q

16m flares colours and symbols

A

Green triangle
White line
Red Cross

27
Q

Flares height and duration

A

5-7 seconds 200ft

28
Q

Other flares and function

A

Day night flares
Ribbed for night

29
Q

How many fire extinguishers

A

6

30
Q

How many oxygen bottles

A

5

31
Q

How many quick dons

A

21 spread between mid and aft

32
Q

Warning and notes for toilet oxygen

A

Warning: should not be warn for fire fighting.

Note: bayonet must be connected

33
Q

How many ms10 are fitted and capacity

A

2 or 3 depending on capacity
10

34
Q

When would extra ms10 be needed

A

Flying further than 50nm from land

35
Q

Where do you attach the escape rope on aft door

A

Top right of the aft door

(From Jack can’t ditch in aft door though?)

36
Q

Frequency range RF channels

A

136-173.5 mhz

37
Q

How many beams difar beam forms

A

5
North
South
East
West
Max

38
Q

Blocked rf channel

A

57,58

39
Q

Channels that can be used within 50nm of land

A

1-31 (17)

40
Q

How much life for bathy

A

12mins 9mins print

41
Q

Bathy depth

A

2625

42
Q

Cable drop speed for bathy

A

5ft per sec

43
Q

Cable depths for difar

A

45 CSO
90
200
400
1000

44
Q

Modes selectable for difar

A

CSO,CO,XCO,DIFAR

45
Q

Depths for dicass

A

50 150 300

90 400 1500

46
Q

Sonic freq and dbs for dicass

A

6500 199
7500 200
8500 201
9500 201

47
Q

How many codes does SUS have

A

5

48
Q

What Db does SUS produce

A

160db

49
Q

How many seconds does SUS last

A

70

50
Q

TSD bouy colours

A

Green, local
White, tuned
Yellow, degraded
Blue, off board
Red, failed
Shaded grey, scuttled

51
Q

Rf frequency spacing

A

0.375mhz

52
Q

Freq ranges for Difar modes

A

CSO 30hz-5000hz
Difar 5hz-2400
CO 5-20000hz
XCO 5-40000hz
(20/40khz)

£&£81 (9 decks)

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