End Of Applied Flashcards
What are the two types of beam forming in DIFAR
Cardioid and limicon
Passive sonar equation
SE=SL-PL-AN-(RD)-DI
DI = 0 for p8
RD = 6.5 for p8
FOM
FOM=SL-AN-RD
What do you get from wentz Knutson curves
Predicted AN
What do you get form mimic wader curves
AN based on hz and depths
3 factors effecting velocity
Temp 6ft per 1f
Salinity 4.6ft per 1 part per thousand
Pressure 1.6ft per 100ft
Sound propagation paths in water
Surface duct, direct path, bottom bounce, deep sound channel, CZ
3 types of spreading and db loss
Cylindrical 3dB
Spherical 6db
Dipolar 12db
3 types of spreading and db loss
Cylindrical 3dB
Spherical 6db
Dipolar 12db
3 layer ocean model
Mixed layer
Thermocline
Deep water
Define sound
The periodic variation in pressure in an elastic medium
What is SLD
The maximum velocity in the first 1000ft
HALT
High away low towards
Define ocean fronts
Boundary between two distinct water masses
3 factors effecting detectability
Resolution, integration normalisation
Merch rpm bracket
Small 210+ medium 130-210
Large 50-90
Two types of AN
Manmade and natural
What is ANR and what does it do
Active noise reduction
Suppresses unwanted noise to focus on target noise
Equipment in the LSJ pocket
5X 50ml water
16mm flares
First aid kit
Heliograph
Razor blades
Ground air codes
Foil blanket
LMD
Batteries
Cutter
Components of LSJ
2 oral inflation tubes
Antenna
Water activated lights
Whistle
Lifeline and retaining toggle
Lifting brackets
Reflecting tape
LMD modes
Strobe, blue, infrared
EPLB modes
On, armed, off, test
When would the EPLB automatically activate
11g impact
EPLB Freq
121.5, 243, 406 mhz
