Echo Sounder Flashcards
What are properties of the water which change the velocity of sound in water?
Temperature
Salinity
Pressure
What non-water factors affect the propagation of sound in water?
Marine Life
Bottom type
What do Sound Velocity Curves look like?
What frequency for shallow depths? High or low?
High
What frequency for deeper waters? High or low
Low
Why do we use a narrow beamwidth with the Echo Sounder?
The footprint can be very large once it reaches the distant sea floor
Mariport Echo Sounder: Frequency
30 kHz
Marport Echo Sounder: Depth
0.6 - 3000m
Marport Echo Sounder: Components
Control Display Unit
Remote Display
Sonar Processor
Transducers
What does the Control Display Unit do?
Display’s depth
What does the Sonar Processor do?
Generates signals
Receives signals
Calculates the depth
What do the Transducers do?
Send the signal into the medium
Echo-Sounder interfaces
SHINNADS
NDDS
EPG&D
