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17 Cards in this Set
- Front
- Back
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List the 3 main requirements for a successful underwater detection system |
1. Good penetration (active) or sensitivity (passive) 2. High Resolution 3. High data rate |
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List the 2 primary modes of Sonobuoy operation |
Active Passive |
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List the 4 characteristics of a Lofargram |
1. Time 2. Frequency 3. Intensity 4. Direction |
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Define the Doppler effect |
The apparent change in frequency due to relative motion between a source and a receiver |
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What is DSCPA? |
Doppler Shift Closest Point of Approach |
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What are the 6 pieces of information that can be gained from CPA? |
1. Depth 2. Range 3. Bearing 4. F0 5. Track 6. Speed |
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How to calculate Submarine speed using CPA |
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List the 2 types of diesel engines |
2 stroke 4 stroke |
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Define Crankshaft Rate (CSR) |
The number of times the crankshaft rotates in 1 second (Hz) |
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Define Cylinder Firing Rate (CFR) |
The number of times an individual cylinder fires in 1 second (Hz) |
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Define Engine Firing Rate (EFR) |
The number of times the engine fires in 1 second (CFR x No. Of Cylinders) (Hz) |
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Define Engine RPM (ERPM) |
The number of times the Crankshaft rotates in 1 minute (CSR x 60) |
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Useful Equations |
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List Characteristics of DIFAR Sonobuoy |
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List the Characteristics of DICASS Sonobuoys |
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List the Characteristics of Bathy Sonobuoys |
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Explain the Sonobuoy deployment pattern |
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