8.11 Anti-Submarine Warfare Flashcards
Necessary components for sound transmission
Source
Medium
Receiver
Factors Affecting Sound Speed
Temperature
-Has greatest affect on speed
Salinity
Pressure (Depth)
Increase will yield an increase in sound speed
Propagation Loss
The difference between sound at the source and sound received.
Spreading
Absorption
Scattering
Bottom Loss
Ambient Noise
Noise that is present in the ocean
Hydrodynamics
Seismic activity
Biologics
Ocean Traffic
Expendable Bathythermograph (XBT)
Ocean sampling tool
Data collected is input to ocean modeling system
Different Propagation Paths
Direct Path
Surface Duct
Sound Channel
Bottom Bounce
Convergence Zone
Modes of SONAR
Passive
Active
Broadband v. Narrowband
Target Motion Analysis (TMA)
Analyzing changes in bearing and frequency of contact over time
External (CSG/ESG) ASW Organization
CWC
ASWC
HEC
Submarine Ops Coordinating Authority (SOCA)
Search and Attach Unit (SAU)
Search and Attack Unit (SAUC) Commander
Scene of Action Commander (SAC)
ASW Operational Battlespace terms
Datum
Datum Error
Furthest On Circle (FOC)
Torpedo Danger Area/Weapons Engagement Zone (TDA/WEZ)
Torpedo Danger Zone (TDZ)
ASW Aircraft assets
MH-60R Seahawk
P-8 Poseidon
ASW Surface assets
Any and all Surface units
ASW Submarine assets
SSNs
Passive SONAR advantages
Covert
Long detection ranges
Passive SONAR disadvantages
Bearing error
Lengthy TMA
Active SONAR advantages
Good against diesel threats
Ideal for localization
Active SONAR disadvantages
Extremely overt
False targets
Gives away own ship position and type
OOD/CICWO Considerations
Towing restrictions
Weather
TMA leg changes
Operating in a Screen formation
ASW Surface advantages
Endurance and Payload
Extensive comms. Suite and processing capabilities
ASW Surface disadvantages
Loud
Operate in areas of high ambient noise
Vulnerable to submarine attack
ASW aircraft advantages
Standoff attack/invulnerable to submarine attack
Extended range and rapid deployment
Minimal time for reload and refuel
ASW aircraft disadvantages
Range may be limited
Time on station may be limited depending on range
Helicopters are limited in processing capabilities
Shipboard Procedures that affect ASW
Cavitation
Cavitation Speed
Optimum SONAR Speed
Shipboard Noise Sources
Noise Mitigation
Waterspace Management
Procedures intended to prevent inadvertent attacks on friendly submarines
Shipboard Torpedo Counter measures
Maneuvers
Acoustic Device CM (ADC)
AN/SLQ-25 NIXIE
ASW Operational Battlespace
